| AKIYAMA Iwaki |  |
| Faculty of Life and Medical Sciences Department of Biomedical Information | |
| Professor |
Last Updated :2025/03/21
Researcher Profile and Settings
researchmap
Research Interests
Research Areas
- Life sciences / Medical equipment testing
- Life sciences / Biomaterials
- Life sciences / Biomedical engineering
- Life sciences / Medical systems
Research Experience
- Doshisha University, Faculty of Life and Medical Sciences, professor, 2012/04 - Today
- Shonan Institute of Technology, Faculty of Engineering, professor, 1994/11 - 2012/03
- Shonan Institute of Technology, Faculty of Engineering, Associate Professor, 1991/04 - 1994/10
- Shonan Institute of Technology, Faculty of Engineering, Assistant Professor, 1987/04 - 1991/03
Education
- Keio University, Graduate School of Engineering, Electrical Engineering, - 1987
- Keio University, Faculty of Engineering, Department of Electrical Engineering, - 1982
Association Memberships
- 電子情報通信学会
- 計測制御学会
- 応用物理学会
- アジア超音波医学生物学連合
- 日本音響学会
- 世界超音波医学生物学連合
- 日本超音波医学会
- The Acoustical Society of America
- The Institute of Electrical and Electronics Engineers
- Asian Federation of Societies for Ultrasound in Medicine and Biology
- World Federation for Ultrasound in Medicine and Biology
- The Japan Society of Ultrasonics in Medicine
Committee Memberships
- Secretary, 2023/05 - Today, World Federation for Ultrasound in Medicine and Biology, Society
- President, 2022/11 - Today, Asian Federation of Societies for Ultrasound in Medicine and Biology, Society, アジア超音波医学生物学連合
- 代議員, 2012 - Today, 日本音響学会, Society, 日本音響学会
- Biomedical Acoustics Technical Committee, 2010/05 - Today, Acoustical Society of America, Society
- 理事, 1998/05 - Today, 日本超音波医学会, Society, 日本超音波医学会
- Co-Opted Councilor, 2021/05 - 2023/05, World Federation for Ultrasound in Medicine and Biology, Society
- 機器及び安全に関する委員会, 2002/05 - 2022/03, 日本超音波医学会, Society
- Administrative Councilor, 2017/10 - 2021/05, World Federation for Ultrasound in Medicine and Biology, Society, World Federation for Ultrasound in Medicine and Biology
- 科学研究費委員会専門委員, 2013/12 - 2014/11, 日本学術振興会, Society
- 理事, 2001/05 - 2003/04, 日本音響学会, Society
Awards
- Technical Achievement Award
Aug. 2012, International Acoustical Imaging Symposium - 日本超音波医学会松尾賞
2005, Japan - 安藤博学術奨励賞
Jun. 1991, 財団法人安藤研究所 - 粟屋賞
Mar. 1991, 日本音響学会
Published Papers
- Acoustic radiation force impulse (push pulse)-induced lung hemorrhage: investigating the effect of ultrasound contrast agent in rabbits.
Noriya Takayama; Hideki Sasanuma; Kazuma Rifu; Naotaka Nitta; Iwaki Akiyama; Nobuyuki Taniguchi
Journal of medical ultrasonics (2001), 16 Nov. 2024, Scientific journal - Correction to: Acoustic radiation force impulse-induced lung hemorrhage: investigating the relationship with peak rarefactional pressure amplitude and mechanical index in rabbits.
Noriya Takayama; Hideki Sasanuma; Kazuma Rifu; Naotaka Nitta; Iwaki Akiyama; Nobuyuki Taniguchi
Journal of medical ultrasonics (2001), 51(2) 381 - 381, Apr. 2024 - 超音波医学をどう広めるか?～医学教育と一般広報について～ 超音波医学をどう広めるか?
小川 眞広; 秋山 いわき; 工藤 信樹; 紺野 啓; 長沼 裕子; 新田 尚隆; 水野 隆; 畠 二郎
超音波医学, (公社)日本超音波医学会, 50(Suppl.) S547 - S547, Apr. 2023 - Acoustic radiation force impulse-induced lung hemorrhage: investigating the relationship with peak rarefactional pressure amplitude and mechanical index in rabbits.
Noriya Takayama; Hideki Sasanuma; Kazuma Rifu; Naotaka Nitta; Iwaki Akiyama; Nobuyuki Taniguchi
Journal of medical ultrasonics (2001), 11 Feb. 2023, Scientific journal - SWEのリスクとベネフィットを考える Shear wave elastographyの潜在的リスクについて
新田 尚隆; 高山 法也; 利府 数馬; 笹沼 英紀; 谷口 信行; 秋山 いわき
超音波医学, (公社)日本超音波医学会, 49(Suppl.) S571 - S571, Apr. 2022 - In Vivo Temperature Rise Measurements of Rabbit Liver and Femur Bone Surface Exposed to an Acoustic Radiation Force Impulse
Naotaka Nitta; Yasunao Ishiguro; Hideki Sasanuma; Noriya Takayama; Kazuma Rifu; Nobuyuki Taniguchi; Iwaki Akiyama
Ultrasound in Medicine & Biology, Elsevier BV, Apr. 2022, Scientific journal - Ultrasonic Heating Detects Lipiodol Deposition within Liver Tumors after Transarterial Embolization: An In Vivo Approach
Natsuhiko Saito; Toshihiro Tanaka; Kiyoyuki Minamiguchi; Ryosuke Taiji; Hideyuki Nishiofuku; Takeshi Matsumoto; Toshiko Hirai; Kimihiko Kichikawa; Naoki Kawahara; Daiki Matsuda; Iwaki Akiyama
Biology, MDPI AG, 10(9) 901 - 901, 12 Sep. 2021, Scientific journal - Acoustic radiation force impulse under clinical conditions with single infusion of ultrasound contrast agent evoking arrhythmias in rabbit heart
Kazuma Rifu; Hideki Sasanuma; Noriya Takayama; Naotaka Nitta; Yukiyo Ogata; Iwaki Akiyama; Nobuyuki Taniguchi
Journal of Medical Ultrasonics, Springer Science and Business Media LLC, 48(2) 137 - 144, 10 Apr. 2021, Scientific journal - Preliminary Investigation of Magnetic Resonance Imaging Guided Beamforming in Flexible Type Ultrasonic Array Transducers
Koki Hasegawa; Kengo Namekawa; Shinji Takayanagi; Iwaki Akiyama
Frontiers in Physics, Frontiers Media SA, 9, 18 Mar. 2021, Scientific journal - Ultrasonic measurement of sound velocity fluctuations in biological tissue due to ultrasonic heating and estimation of thermo-physical properties
Yukako Tsujimoto; Mai Morimoto; Naotaka Nitta; Iwaki Akiyama
Journal of Medical Ultrasonics, 46(1) 35 - 43, Jan. 2019, Scientific journal - Ultrasonic Electronics
Iwaki Akiyama; Pak Kon Choi; Hiroyuki Hachiya; Akira Harata; Hideyuki Hasegawa; Kenya Hashimoto; Shoji Kakio; Nobuki Kudo; Subaru Kudo; Mami Matsukawa; Tatsuro Matsuoka; Koichi Mizutani; Kentaro Nakamura; Hirotsugu Ogi; Shinichi Takeuchi; Takao Tsuchiya; Shin ichiro Umemura; Yasuaki Watanabe; Ken Yamada; Kyuichi Yasui
Japanese Journal of Applied Physics, 57(7), Jul. 2018, Scientific journal - Foreword ultrasonic electronics
Mami Matsukawa; Jun Kondoh; Keiji Sakai; Iwaki Akiyama; Pak Kon Choi; Hiroyuki Hachiya; Akira Harata; Hideyuki Hasegawa; Kenya Hashimoto; Shoji Kakio; Nobuki Kudo; Subaru Kudo; Tatsuro Matsuoka; Koichi Mizutani; Kentaro Nakamura; Hirotugu Ogi; Sinichi Takeuchi; Takao Tsuchiya; Shinichiro Umemura; Yasuaki Watanabe; Ken Yamada; Kyuichi Yasui
Japanese Journal of Applied Physics, 56(7), Jul. 2017, Scientific journal - Investigating the type and strength of emotion with music: An fMRI study
Teruhisa Okuya; Toshihiko Date; Miwa Fukino; Mikio Iwakawa; Kohji Sasabe; Kumi Nagao; Yuki Moriizumi; Iwaki Akiyama; Yoshiaki Watanabe
Acoustical Science and Technology, Acoustical Society of Japan, 38(3) 120 - 127, 2017, Scientific journal - Measurement of sound pressure and temperature in tissue-mimicking material using an optical fiber Bragg grating sensor
Keisuke Imade; Takashi Kageyama; Daisuke Koyama; Yoshiaki Watanabe; Kentaro Nakamura; Iwaki Akiyama
JOURNAL OF MEDICAL ULTRASONICS, SPRINGER JAPAN KK, 43(4) 473 - 479, Oct. 2016, Scientific journal - The effect of ultrasound with acoustic radiation force on rabbit lung tissue: a preliminary study.
Noriya Takayama; Yasunao Ishiguro; Nobuyuki Taniguchi; Kazuki Akai; Hideki Sasanuma; Yoshikazu Yasuda; Naotaka Nitta; Iwaki Akiyama
Journal of medical ultrasonics (2001), 43(4) 481 - 5, Oct. 2016, Scientific journal - Measurement of flow velocity using crossed beam contrast echo method
YOSHIDA Kenji; ONISHI Shoma; EURA Taishi; WATANABE Kimiaki; WATANABE Yoshiaki; AKIYAMA Iwaki
Choonpa Igaku, The Japan Society of Ultrasonics in Medicine, 43((2)) 265 - 277, 2016 - Erratum to: Ultrasound exposure (mechanical index 1.8) with acoustic radiation force impulse evokes extrasystolic waves in rabbit heart under concomitant administration of an ultrasound contrast agent.
Yasunao Ishiguro; Naotaka Nitta; Nobuyuki Taniguchi; Kazuki Akai; Noriya Takayama; Hideki Sasanuma; Yukiyo Ogata; Yoshikazu Yasuda; Iwaki Akiyama
Journal of medical ultrasonics (2001), 43(1) 9 - 9, Jan. 2016 - Ultrasound exposure (mechanical index 1.8) with acoustic radiation force impulse evokes extrasystolic waves in rabbit heart under concomitant administration of an ultrasound contrast agent.
Yasunao Ishiguro; Naotaka Nitta; Nobuyuki Taniguchi; Kazuki Akai; Noriya Takakayama; Hideki Sasanuma; Yukiyo Ogata; Yoshikazu Yasuda; Iwaki Akiyama
Journal of medical ultrasonics (2001), 43(1) 3 - 7, Jan. 2016, Scientific journal - 超音波Bモード像における音速分布の補正
五島 僚太郎; 小南 成史; 渡辺 好章; 山谷 裕哉; 丸上 永晃; 平井 都始子; 秋山 いわき
超音波医学, (公社)日本超音波医学会, 42(2) 255 - 255, Mar. 2015 - The arrhythmogenic effect of ultrasonic exposure with acoustic radiation force (ARF) impulse on the rabbit heart with ultrasound contrast agent perfluorobutane.
Yasunao Ishiguro; Hideki Sasanuma; Naotaka Nitta; Nobuyuki Taniguchi; Yukiyo Ogata; Yoshikazu Yasuda; Iwaki Akiyama
Journal of medical ultrasonics (2001), 42(1) 47 - 50, Jan. 2015, Scientific journal - Experimental system for in-situ measurement of temperature rise in animal tissue under exposure to acoustic radiation force impulse.
Naotaka Nitta; Yasunao Ishiguro; Hideki Sasanuma; Nobuyuki Taniguchi; Iwaki Akiyama
Journal of medical ultrasonics (2001), 42(1) 39 - 46, Jan. 2015, Scientific journal - Compensation method for frequency-dependent attenuation in tissue imaging by amplitude modulation for chirp transmission
Takuya Hiraoka; Norio Tagawa; Kan Okubo; Iwaki Akiyama
Acoustical Science and Technology, Acoustical Society of Japan, 36(3) 201 - 207, 2015, Scientific journal - 音速分布を考慮した超音波イメージング MRIによる音速推定の試み
五島 僚太郎; 大谷 真穂; 渡辺 好章; 山谷 裕哉; 丸上 永晃; 平井 都始子; 秋山 いわき
超音波医学, (公社)日本超音波医学会, 41(Suppl.) S468 - S468, Apr. 2014 - 超音波照射による生体組織の安全性評価 動物実験用システム
新田 尚隆; 石黒 保直; 笹沼 英紀; 安田 是和; 谷口 信行; 秋山 いわき
電子情報通信学会技術研究報告(超音波), (一社)電子情報通信学会, 113(167) 37 - 40, Jul. 2013 - Do We Need to Restrict the Use of Doppler Ultrasound in the First Trimester of Pregnancy?
Gail R. Ter Haar; Jacques S. Abramowicz; Iwaki Akiyama; David H. Evans; Marvin C. Ziskin; Karel Maršál
Ultrasound in Medicine and Biology, Elsevier USA, 39(3) 374 - 380, 2013 - Recursive reduction of frequency dependent attenuation for wide-band ultrasound imaging in a living body
Takuya Hiraoka; Norio Tagawa; Kan Okubo; Iwaki Akiyama
IEEE International Ultrasonics Symposium, IUS, 914 - 917, 2013, International conference proceedings - Development of Multiple-Frequency Ultrasonic Imaging System Using Multiple Resonance Piezoelectric Transducer
Iwaki Akiyama; Natsuki Yoshizumi; Shigemi Saito; Yuji Wada; Daisuke Koyamay; Kentaro Nakamura
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 51(7) 07GF02 , Jul. 2012, Scientific journal - Temperature Elevation of Biological Tissue Model Exposed by Focused Ultrasound with Acoustic Radiation Force
Naotaka Nitta; Nobuki Kudo; Iwaki Akiyama
NONLINEAR ACOUSTICS: STATE-OF-THE-ART AND PERSPECTIVES (ISNA 19), AMER INST PHYSICS, 1474 264 - 267, 2012, International conference proceedings - Proposal for Blood-Flow Imaging by Contrast Echo Using Counter-Crossed Beams
T. Eura; K. Yoshida; Y. Watanabe; T. Takayasu; K. Nakamura; I. Akiyama
ACOUSTICAL IMAGING, VOL 30, SPRINGER, 30 47 - 52, 2011, International conference proceedings - ２つの超音波の非線形相互作用を用いたイメージング
秋山 いわき
非破壊検査, 59 542 - 548, 2010 - Rescue Radar with Two Dimensional Array Antennas
AKIYAMA Iwaki; TAKEUCHI Toshio; SAITO Hideo
JRSJ, The Robotics Society of Japan, 28(2) 164 - 168, 2010 - Preliminary Study of Broadband Transducer for Measurement of Bone Characteristics
Takasuke Irie; Kouhei Koumoto; Masayuki Tanabe; Norio Tagawa; Kan Okubo; Iwaki Akiyama; Kouichi Itoh
JAPANESE JOURNAL OF APPLIED PHYSICS, JAPAN SOC APPLIED PHYSICS, 49(7) 07HF29 , 2010, Scientific journal - Blood Flow Measurement by the Counter-Crossed Beam Contrast Echo Method
Taishi Eura; Kenji Yoshida; Yoshiaki Watanabe; Iwaki Akiyama
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 49(7) 07HF05 , 2010, Scientific journal - Numerical evaluation of a composite-based multiple-resonance transducer
Kentaro Nakamura; Yuji Wada; Daisuke Koyama; Shigimi Saito; Iwaki Akiyama
Proceedings - IEEE Ultrasonics Symposium, 2408 - 2411, 2010, International conference proceedings - Multiple-frequency ultrasonic imaging by transmitting pulsed waves of two frequencies
Natsuki Yoshizumi; Shigemi Saito; Daisuke Koyama; Kentaro Nakamura; Akihisa Ohya; Iwaki Akiyama
JOURNAL OF MEDICAL ULTRASONICS, SPRINGER JAPAN KK, 36(2) 53 - 60, Jun. 2009, Scientific journal - On-rubble robot systems for the DDT Project
Fumitoshi Matsuno; Takashi Tsubouchi; Shigeo Hirose; Iwaki Akiyama; Takao Inoh; Michele Guarnieri; Kenji Kawashima; Takahiro Sasaki; Naoji Shiroma; Tetsushi Kamegawa; Kazunori Ohno; Satoshi Tadokoro; Noritaka Sato; Yoshikazu Inoue; Takahide Takeuchi; Hideyuki Tsukagoshi; Masashi Sasaki; Ato Kitagawa; Takahiro Tanaka; Yasuhiro Masutani; Haruo Soeda; Koichi Osuka; Masamitsu Kurisu; Tomoharu Doi; Tadahiro Kaneda; Xin-Zhi Zheng; Hiroshi Sugimoto; Noriyuki Matsuoka; Teruaki Azuma; Masahiro Hatsuda
Rescue Robotics: DDT Project on Robots and Systems for Urban Search and Rescue, Springer London, 105 - 129, 2009, In book - Multiple-frequency ultrasonic imaging using a multiple-resonance transducer
Iwaki Akiyama; Natsuki Yoshizumi; Kentaro Nakamura
Proceedings - IEEE Ultrasonics Symposium, 2009, International conference proceedings - A New Contrast Echo Imaging Method Using Crossed Beams of Two Ultrasonic Frequencies
Naoki Yoshimato; Kenji Yoshida; Yoshiaki Watanabe; Iwaki Akiyama
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 47(5) 4188 - 4192, May 2008, Scientific journal - NONLINEAR MULTIBEAM ULTRASONIC IMAGING
I. Akiyama; N. Yoshizumi; A. Ohya; S. Saito
ACOUSTICAL IMAGING, VOL 29, SPRINGER, 29 259 - +, 2008, International conference proceedings - 二周波駆動超音波振動子のビーム特性
秋山 いわき
電子情報通信学会論文誌Ａ, J91A(12) 1125 - 1133, 2008 - Measurement of Survivor Location for Rescue Radar System by using Two Dimensional Array Antenna
Toshio Takeuchi; Yuko Uematsu; Hideo Saito; Yoshimitsu Aoki; Akihisa Ohya; Fumitoshi Matsuno; Iwaki Akiyama
2008 IEEE INTERNATIONAL WORKSHOP ON SAFETY, SECURITY & RESCUE ROBOTICS, IEEE, 1 - +, 2008, International conference proceedings - Measurement of secondary waves generated by nonlinear vibration of microbubbles in the crossed beams of two ultrasonic frequencies
Iwaki Akiyama; Naoki Yoshimato; Kenji Yoshida; Yoshiaki Watanabe
NONLINEAR ACOUSTICS FUNDAMENTALS AND APPLICATIONS, AMER INST PHYSICS, 1022 432 - +, 2008, International conference proceedings - 超広帯域ティッシュハーモニックイメージング
秋山 いわき
日本音響学会誌, 63 150 - 156, 2007 - Ultra-broadband ultrasonic imaging using bi-layer structure probe
I. Akiyama; A. Ohya; S. Saito
Acoustical Imaging, Vol 28, SPRINGER, 28 101 - 109, 2007, International conference proceedings - Development of an ultra-broadband ultrasonic imaging system: Prototype mechanical sector device
Iwaki Akiyama; Shigemi Saito; Akihisa Ohya
Journal of Medical Ultrasonics, 33(2) 71 - 76, Jun. 2006, Scientific journal - 超広帯域超音波イメージングシステムの開発--メカニカルセクタ装置の試作とその映像 (特集 医用超音波最前線)
秋山, いわき; 大矢, 晃久
Ultrasonic technology, 日本工業出版, 18(2) 29 - 31,126, Mar. 2006, Scientific journal - Introduction of mission unit on information collection by on-rubble mobile platforms of development of rescue robot systems (DDT) project in Japan
Fumitoshi Matsuno; Shigeo Hirose; Iwaki Akiyama; Takao Inoh; Michele Guarnieri; Naoji Shiroma; Tetsushi Kamegawa; Kazunori Qhno; Noritaka Sato
2006 SICE-ICASE International Joint Conference, 4186 - 4191, 2006, International conference proceedings - Speckle Noise Reduction by Superposing Many Higher Harmonic Images
AKIYAMA, Iwaki; OHYA, Akihisa; SAITO, Shigemi
Japanese journal of applied physics. Pt. 1, Regular papers, brief communications & review papers, Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics, 44(6) 4631 - 4636, Jun. 2005, Scientific journal - A new system for in vivo assessment of the degree of nonlinear generation using the second harmonic component in echo signals
Yasutomo Fujii; Nobuyuki Taniguchi; Iwaki Akiyama; Jing-Wen Tsao; Kouichi Itoh
Ultrasound in Medicine and Biology, 30(11) 1511 - 1516, Nov. 2004, Scientific journal - Study of a breast tumor extraction algorithm for three-dimensional ultrasound images, using multiple space differentiation filters: Automated breast tumor extraction algorithm with improved accuracy
Hironori Matsudaira; Hiroaki Kawasaki; Kiyoka Omoto; Koichi Itoh; Yuki Takizawa; Iwaki Akiyama
Acoustical Science and Technology, 25(1) 9 - 14, Jan. 2004, Scientific journal - Speckle reduction by summation of higher order harmonic images
Akiyama, I; H Yamamoto; G Ohashi; A Ohya
ACOUSTICAL IMAGING, VOL 27, SPRINGER, 27 651 - 657, 2004, International conference proceedings - Enhancement of Stents Using Interference of Low-frequency Ultrasonic Echo Images
Gosuke, Ohashi; Akihisa, Ohya; Kazunobu, Tobise; Iwaki, Akiyama
Journal of Medical Ultrasonics, 31(2) 67-73 , Jan. 2004, Scientific journal - Ultrasonographic evaluation using the internal echo in normal and cirrhotic livers: Comparison of accuracy of gray-scale and binary black-and-white images and their intraobserver reproducibility and interobserver agreement
Yi Wang; Nobuyuki Taniguchi; Kouichi Itoh; Yasutomo Fujii; Kouichirou Shigeta; Kiyoka Omoto; Iwaki Akiyama
Journal of Medical Ultrasonics, Japan Society of Ultrasonics Medicine, 30(SPRING) 21 - 29, 2003, Scientific journal - Speckle reduction of echographic images using higher order harmonic components
Akiyama, I; H Yamamoto; G Ohashi; A Ohya
2003 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2, IEEE, 1642 - 1645, 2003, International conference proceedings - Ultrasonic imaging with narrow aperture phased array
N Takizawa; A Ohya; Akiyama, I
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE, SCRIPTA TECHNICA-JOHN WILEY & SONS, 86(2) 72 - 81, 2003, Scientific journal - 解説 超音波画像の変位ベクトル計測
大橋, 剛介; 大矢, 晃久; 秋山, いわき
Ultrasonic technology, 日本工業出版, 14(5) 34 - 38, Sep. 2002, Scientific journal - Development of three dimensional image analysis system for computer aided diagnosis of breast cancer using ultrasonic echography
Akiyama, I; H Matsudaira; H Kawasaki; K Omoto; K Itoh
ACOUSTICAL IMAGING, VOL 26, KLUWER ACADEMIC/PLENUM PUBL, 26 91 - 96, 2002, International conference proceedings - A study on speckle tracking method for three-dimensional ultrasonic imaging
G Ohashi; T Toyoda; A Ohya; Akiyama, I
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE, SCRIPTA TECHNICA-JOHN WILEY & SONS, 85(12) 1 - 8, 2002, Scientific journal - Review of Recent Medical Ultrasonic Technology
AKIYAMA Iwaki
Japanese Journal of Medical Physics, Japan Society of Medical Physics, 21(3) 123 - 127, 30 Sep. 2001 - A COMPUTER - AIDED DIAGNOSIS SYSTEM FOR BREAST TUMOR BY USING THREE - DIMENSIONAL ULTRASONIC IMAGES
LIU Xiaoqiang; CHENG Xiangyong; ITOH Kouichi; OMOTO Kiyoka; AKIYAMA Iwaki
ITE Technical Report, The Institute of Image Information and Television Engineers, 24(2) 15 - 19, 14 Jan. 2000 - Development of Bottle Recognition System Using Acoustic Fourier Transform
Tadashi Honda; Iwaki Akiyama; Masato Nakajima
Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi), John Wiley and Sons Inc., 83(7) 42 - 52, 2000, Scientific journal - Determination and evaluation of the surface region of breast tumors using ultrasonic echohraphy
XY Cheng; Akiyama, I; S Ogawa; K Itoh; K Omoto; Y Wang; N Taniguchi
ACOUSTICAL IMAGING, VOL 24, KLUWER ACADEMIC/PLENUM PUBL, 24 261 - 271, 2000, International conference proceedings - Narrow aperture phased array computed tomography
Akiyama, I; N Takizawa; A Ohya
ACOUSTICAL IMAGING, VOL 25, KLUWER ACADEMIC/PLENUM PUBL, 25 163 - 170, 2000, International conference proceedings - Evaluation of surface roughness of tumor using neural network
I. Akiyama; S. Ogawa; K. Omoto; K. Itoh
Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, IEEE, 2 937 , 1999, International conference proceedings - Improved breast tumor extraction in echographic images using fuzzy reasoning
Xiaoqiang Liu; Xiangyong Cheng; Kouichi Itoh; Kiyoka Omoto; Iwaki Akiyama
Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, IEEE, 2 921 , 1999, International conference proceedings - Breast Tumor Diagnostic System Using Three-Dimensional Ultrasonic Echography
Xiangyong Cheng; Iwaki Akiyama; Yi Wang; Kouichi Itoh
Systems and Computers in Japan, John Wiley and Sons Inc., 30(2-3) 1 - 10, 1999, Scientific journal - Ultrasonic pulsed echo tomography using narrow aperture phased array
Akiyama, I; N Takizawa; A Ohya
1999 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2, IEEE, 1613 - 1616, 1999, International conference proceedings - Ultrasonic tomography using arc focusing beam
N Takizawa; A Ohya; Akiyama, I
1998 IEEE ULTRASONICS SYMPOSIUM - PROCEEDINGS, VOLS 1 AND 2, IEEE, 1659 - 1662, 1998, International conference proceedings - Three dimensional ultrasonic imaging for diagnosis of breast tumor
S Ogawa; K Itoh; K Omoto; Cheng, X; A Ohya; Akiyama, I
1998 IEEE ULTRASONICS SYMPOSIUM - PROCEEDINGS, VOLS 1 AND 2, IEEE, 1677 - 1680, 1998, International conference proceedings - Intelligent systems using fuzzy logic for the determination of breast tumors
XY Cheng; K Itoh; A Ohya; K Omoto; Y Wang; N Taniguchi; S Ogawa; Akiyama, I
PROCEEDINGS OF THE 20TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOL 20, PTS 1-6, IEEE, 20 1356 - 1359, 1998, International conference proceedings - Automated detection of breast tumors in ultrasonic images using fuzzy reasoning
X. Y. Cheng; I. Akiyama; K. Itoh; Y. Wang; N. Taniguchi; M. Nakajima
IEEE International Conference on Image Processing, IEEE Comp Soc, 3 420 - 423, 1997, International conference proceedings - Tomographic Reconstruction Technique for Pulsed-Echo Imaging
Iwaki Akiyama
International Journal of Imaging Systems and Technology, John Wiley and Sons Inc., 8(5) 432 - 437, 1997, Scientific journal - Synthetic aperture computed tomography
Akiyama, I; K Yano
ACOUSTICAL IMAGING, VOL 23, PLENUM PRESS DIV PLENUM PUBLISHING CORP, 23 575 - 581, 1997, International conference proceedings - Breast tumor diagnosis system using three dimensional ultrasonic echography
XY Cheng; Akiyama, I; K Itoh; Y Wang; N Taniguchi; S Ohtsuka; H Mizunuma
PROCEEDINGS OF THE 19TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOL 19, PTS 1-6, IEEE, 19 517 - 520, 1997, International conference proceedings - On the echographic image of biological tissue with self-similarity structure
Akiyama, I; N Taniguchi; K Itoh
ACOUSTICAL IMAGING, VOL 22, PLENUM PRESS DIV PLENUM PUBLISHING CORP, 22 349 - 354, 1996, International conference proceedings - COMPUTER-SIMULATION OF ULTRASONIC IMAGES WITH SELF-SIMILARITY OF TISSUE STRUCTURES
AKIYAMA, I; A OHYA; N TANIGUCHI; K ITOH
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 34(5B) 2826 - 2830, May 1995, Scientific journal - Fractal analysis of ultrasonic images for tissue characterization
I. Akiyama; A. Ohya; M. Nakamura; N. Taniguchi; K. Itoh
Japanese Journal of Medical Ultrasonics, 20(11) 643 - 652, 1993, Scientific journal - Ultrasonic trans-femur tomography
Iwaki Akiyama; Kenji Takagishi; Moritoshi Itoman; Makoto Yamamoto
Journal of the Acoustical Society of Japan (E), 13(5) 323 - 326, 1992, Scientific journal - REFLECTION IMAGING OF NONLINEARITY PARAMETER DISTRIBUTION
AKIYAMA, I; T KOIDE; Y KUMAKURA
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 30 221 - 223, 1991, Scientific journal - Image Reconstruction Technique for Ultrasonic Tomography
AKIYAMA Iwaki
Medical Imaging Technology, The Japanese Society of Medical Imaging Technology, 8(5) 533 - 533, 1990 - NONLINEARITY PARAMETER B/A IMAGING BY USING ULTRASOUND ECHO SIGNALS
AKIYAMA, I
FRONTIERS OF NONLINEAR ACOUSTICS, ELSEVIER APPL SCI PUBL LTD, 379 - 384, 1990, International conference proceedings - AIRBORNE ULTRASONIC SPECKLE VELOCIMETRY
AKIYAMA, I; F MIYAZAKI; H MOMOKAWA
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 28 179 - 181, 1989, Scientific journal - Measurement of Acoustic Nonlinearity Parameter of Biological Tissues
AKIYAMA Iwaki; NAKAJIMA Masato; YUTA Shin'ichi
OYOBUTURI, The Japan Society of Applied Physics, 57(8) 1191 - 1195, 1988 - Development of light beam CT system for measurement of ultrasonic wave fields
Iwaki Akiyama; Masato Nakajima; Hisao Waki; Shin'Ichi Yuta
Electronics and Communications in Japan (Part I: Communications), 71(5) 51 - 60, 1988, Scientific journal - Measurement of finite amplitude ultrasound wave fields by light beam CT
Iwaki Akiyama; Yukihiro Nishida; Hisao Wak; Masato Nakajima; Shin-Ichi Yuta
Japanese Journal of Applied Physics, 25(1) 97 - 99, 1986, Scientific journal
MISC
- Ultrasonic Electronics FOREWORD
Jun Kondoh; Keiji Sakai; Iwaki Akiyama; Hiroyuki Hachiya; Akira Harata; Hideyuki Hasegawa; Shoji Kakio; Subaru Kudo; Nobuki Kudoh; Mami Matsukawa; Koichi Mizutani; Kentaro Nakamura; Hirotsugu Ogi; Shinichi Takeuchi; Shin-ichiro Umemura; Yasuaki Watanabe; Kyuichi Yasui
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 58, Jul. 2019, Others - 超音波照射によるDNA分子の二重鎖切断
石原 和也; 山下 悠介; 吉田 憲司; 秋山 いわき; 剣持 貴弘; 吉川 裕子; 吉川 研一; 渡辺 好章
超音波医学, (公社)日本超音波医学会, 44(Suppl.) S466 - S466, Apr. 2017 - 音響放射力インパルスが肺に及ぼす影響 ウサギを用いた動物実験
高山 法也; 笹沼 英紀; 利府 数馬; 高野 わかな; 新田 尚隆; 石黒 保直; 秋山 いわき; 谷口 信行
超音波医学, (公社)日本超音波医学会, 44(Suppl.) S467 - S467, Apr. 2017 - Part 7. How to insonate living animal - From engineering point of view
NITTA Naotaka; AKIYAMA Iwaki
Choonpa Igaku, The Japan Society of Ultrasonics in Medicine, 44(4) 385 - 388, 2017 - Ultrasonic Electronics FOREWORD
Jun Kondoh; Keiji Sakai; Iwaki Akiyama; Pak-kon Choi; Hiroyuki Hachiya; Akira Harata; Hideyuki Hasegawa; Ken-ya Hashimoto; Shoji Kakio; Subaru Kudo; Nobuki Kudoh; Kentaro Nakamura; Mami Matsukawa; Koichi Mizutani; Hirotsugu Ogi; Shinichi Takeuchi; Takao Tsuchiya; Shin-ichiro Umemura; Yasuaki Watanabe; Ken Yamada; Kyuichi Yasui
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 55(7), Jul. 2016, Others - 機器及び安全に関する最近の研究成果 音響放射力インパルス(ARFI)を伴う超音波と期外収縮
石黒 保直; 新田 尚隆; 赤井 一輝; 高野 わかな; 高山 法也; 小形 幸代; 笹沼 英紀; 安田 是和; 谷口 信行; 秋山 いわき
超音波医学, (公社)日本超音波医学会, 43(Suppl.) S235 - S235, Apr. 2016 - 機器及び安全に関する最近の研究成果 音響放射力を伴う超音波による生体組織の温度上昇
新田 尚隆; 石黒 保直; 赤井 一揮; 笹沼 英紀; 谷口 信行; 高野 わかな; 秋山 いわき
超音波医学, (公社)日本超音波医学会, 43(Suppl.) S235 - S235, Apr. 2016 - Application of Acoustic Radiation Force to the Field of Clinical Diagnosis
AKIYAMA Iwaki
Journal of the Japan Society of Mechanical Engineers, The Japan Society of Mechanical Engineers, 119(1167) 76 - 77, 05 Feb. 2016 - パルスドプラ血流計測における生体組織の周波数依存減衰の影響とその補正
佐藤寛; 手嶋優風; NISHIMURA Jun; 渡辺好章; 飛龍志津子; 秋山いわき
超音波医学, 43, 2016 - 音響キャビテーション発生に伴うメダカ胚への影響
山田健人; 阪口裕暉; 松本恵李那; 吉田憲司; 殿山泰弘; 廣瀬まゆみ; 秋山いわき; 渡辺好章
日本音響学会2016年春季研究発表会, 2016, 2016 - 総論：超音波の特徴と活用分野
秋山いわき
電気評論, 101(9) 7 - 11, 2016 - Ultrasonic Electronics FOREWORD
Iwaki Akiyama; Keiji Sakai; Pak-kon Choi; Hiroyuki Hachiya; Akira Harata; Ken-ya Hashimoto; Shoji Kakio; Jun Kondoh; Subaru Kudo; Nobuki Kudoh; Minoru Kurosawa; Mami Matsukawa; Tatsuro Matsuoka; Koichi Mizutani; Kentaro Nakamura; Toshiaki Nakamura; Hirotsugu Ogi; Shinichi Takeuchi; Shin-ichiro Umemura; Yasuaki Watanabe; Ken Yamada; Kyuichi Yasui
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 54(7), Jul. 2015, Others - 超音波はどこまで安全か 超音波造影剤投与下の音響放射力インパルス(ARFI)のウサギ心臓への照射と期外収縮
石黒 保直; 新田 尚隆; 赤井 一揮; 高山 法也; 小形 幸代; 笹沼 英紀; 安田 是和; 谷口 信行; 秋山 いわき
超音波医学, (公社)日本超音波医学会, 42(Suppl.) S229 - S229, Apr. 2015 - 音響放射力インパルス照射下のウサギ肝臓及び大腿骨上における温度上昇のin vivo測定
NITTA NAOTAKA; ISHIGURO YASUNAO; SASANUMA HIDEKI; TANIGUCHI NOBUYUKI; AKIYAMA IWAKI
超音波医学, (一社)日本超音波医学会, 42(2) 283 - 283, 15 Mar. 2015 - A-1-19 音速分布を考慮した超音波イメージング : MRIのT1・T2値による音速の推定(A-1.回路とシステム,一般セッション)
三原 伸公; 高杉 一等; 渡辺 好章; 秋山 いわき
電子情報通信学会総合大会講演論文集, 一般社団法人電子情報通信学会, 2015 19 - 19, 24 Feb. 2015 - 受波信号によって送波信号を最適化する超音波ドプラ血流計測法の提案
手嶋優風; 柏村祐樹; 飛龍志津子; 秋山いわき
日本音響学会研究発表会講演論文集(CD-ROM), 2015, 2015 - 臨床診断における音響放射力の利用
秋山いわき
日本機械学会誌, 1,191,167 18 - 19, 2015 - 3P2-3 Comparison of FBG sensors and thermocouples for measurement of temperature rise by exposure to ultrasound(Poster Session)
Imade Keisuke; Koyama Daisuke; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 35 421 - 422, 03 Dec. 2014 - 2P5-13 Ultrasonic measurement of temperature distribution of biological tissue by local heating(Poster Session)
Morita Akihisa; Morimoto Mai; Watanabe Yoshiaki; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 35 329 - 330, 03 Dec. 2014 - 2P5-5 Ultrasound measurement of the blood flow vector by using microbubble(Poster Session)
Ohnishi Shouma; Ikemoto Kyouko; Watanabe Yoshiaki; Akiyaman Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 35 313 - 314, 03 Dec. 2014 - Ultrasonic Electronics FOREWORD
Kentaro Nakamura; Keiji Sakai; Iwaki Akiyama; Pak-kon Choi; Hiroyuki Hachiya; Akira Harata; Ken-ya Hashimoto; Shoji Kakio; Hiroshi Kanai; Jun Kondoh; Subaru Kudo; Nobuki Kudoh; Minoru Kurosawa; Mami Matsukawa; Tatsuro Matsuoka; Koichi Mizutani; Jun Morimoto; Toshiaki Nakamura; Hirotsugu Ogi; Tsuyoshi Shina; Shinichi Takeuchi; Kenshin Tsuchiya; Takao Tsuchiya; Shin-ichiro Umemura; Yasuaki Watanabe; Akira Yamada; Ken Yamada; Kyuichi Yasui
JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 53(7), Jul. 2014, Others - Measurement of heat capacity per unit volume of the biological tissue exposed to ultrasound : Phantom experiments
Shimizu Kantaro; Murakami Shin'ichi; Watanabe Yoshiaki; Akiyama Iwaki
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 114(102) 31 - 35, 16 Jun. 2014 - 超音波造影剤投与下のウサギ心臓における音響放射カインパルス(ARFI:Acoustic Radiation Force Impulse)の心電図波形に与える影響についての検討
石黒 保直; 新田 尚隆; 笹沼 英紀; 安田 是和; 秋山 いわき; 谷口 信行
超音波医学, (一社)日本超音波医学会, 41(3) 464 - 465, May 2014 - FDA Compensation of Tissue Harmonic Imaging by AM Modulation of FM Chirp Transmission Signal
平岡拓也; 田川憲男; 大久保寛; 秋山いわき
電子情報通信学会技術研究報告, (一社)電子情報通信学会, 113(439(US2013 93-112)) 25 - 30, 14 Feb. 2014 - In Vivo Measurement of Temperature Rise in Living Rabbit's Liver Exposed to Ultrasound with Acoustic Radiation Force
Naotaka Nitta; Yasunao Ishiguro; Hideki Sasanuma; Nobuyuki Taniguchi; Iwaki Akiyama
2014 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), IEEE, 2014 Vol.2 1175 - 1178, 2014 - Generating Bubbles, Diagnosing by Bubbles, and Treating with Bubbles: From Generation of Ultrasonic Contrast Agent to Its Medical Application (2): Application to diagnosis: Contrast Imaging
AKIYAMA Iwaki
Med Imag Tech, The Japanese Society of Medical Imaging Technology, Vol.32,(No.1) 49 - 52, 2014 - Compensation Method of Frquency Dependent Attenuation for Tissue Harmonic Imaging
Takuya Hiraoka; Norio Tagawa; Kan Okubo; Yihsin Ho; Iwaki Akiyama
2014 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), IEEE, 1085 - 1088, 2014, Summary international conference - 広帯域パルス圧縮画像化における再帰的FDA補正の性能解析
平岡拓也; 田川憲男; 秋山いわき; 大久保寛
超音波医学, (公社)日本超音波医学会, 40(Suppl.) S702 - S702, 15 Apr. 2013 - A Preliminary Study of Ultrasound Doppler Method for Blood Flow Measurement Using Microbubble
渡邉 公章; 渡辺 好章; 秋山 いわき
同志社大学理工学研究報告, 同志社大学理工学研究所, 53(4) 93 - 97, Jan. 2013 - Development of In Vivo Measurement System for Temperature Rise in Animal Tissue under Exposure to Ultrasound with Acoustic Radiation Force
Naotaka Nitta; Nobuki Kudo; Tomoo Kamakura; Yasunao Ishiguro; Hideki Sasanuma; Nobuyuki Taniguchi; Iwaki Akiyama
2013 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), IEEE, 2013 Vol.1 386 - 389, 2013 - 周波数依存減衰を補正したパルス圧縮広帯域画像化の検討
河本江平; 田川憲男; 大久保寛; 秋山いわき
超音波医学, (公社)日本超音波医学会, 39(Suppl.) S516 - S516, 15 Apr. 2012 - On The Effects of Frequency Dependent Attenuation of Biological Tissues in Ultrasonic Imaging : Transmitting Waveform Relevant to Imaging Depth
AKIYAMA Iwaki
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 111(402) 43 - 48, 19 Jan. 2012 - Wide Band Pulse Compression Imaging with Transmission Compensation for Frequency Dependent Attenuation
Kouhei Koumoto; Kouhei Nii; Norio Tagawa; Kan Okubo; Iwaki Akiyama
2012 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), IEEE, 1658 - 1661, 2012 - 骨内画像化への応用を目指した広帯域超音波探触子に関する検討
河本江平; 入江喬介; 田邉将之; 田川憲男; 大久保寛; 秋山いわき; 伊東紘一
超音波医学, (公社)日本超音波医学会, 37(Suppl.) S469 - S469, 15 Apr. 2010 - 多共振型圧電振動子の音響特性
秋山いわき; 吉住夏輝; 斎藤繁実; 大平克己; 高橋修; 和田有司; 小山大介; 中村健太郎
圧電材料・デバイスシンポジウム, 2010, 2010 - 超音波による医療画像計測
秋山いわき; 吉住夏輝; 中村健太郎; 江浦太之; 渡邊好章
計測と制御, 49 38 - 44, 2010 - 超音波による医療画像計測
秋山 いわき
計測と制御, 49 38 - 44, 2010 - 2P5-11 Multi-resonance transducer for ultrasonic imaging(Poster Session)
Yoshizumi Natsuki; Nakamura Kentaro; Saito Shigemi; Ohira Katsumi; Takahashi Osamu; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 30 341 - 342, 18 Nov. 2009 - 3P5-13 Blood flow measurement by Counter-Crossed Beam Contrast Echo method : Prototype system using ultrasound diagnostic equipment(Poster Session)
Eura Taishi; Yoshida Kenji; Watanabe Yoshiaki; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 30 547 - 548, 18 Nov. 2009 - Ultrasonic Imaging Using Multiple Resonance Transducer
YOSHIZUMI Natsuki; NAKAMURA Kentaro; AKIYAMA Iwaki
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 109(107) 43 - 48, 19 Jun. 2009 - Fundamental study on Counter-Crossed Beam Contrast Echo method : Measurement of flow velocity by sum frequency component
EURA Taishi; YOSHIDA Kenji; WATANABE Yoshiaki; AKIYAMA Iwaki
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 108(410) 105 - 110, 22 Jan. 2009 - 二周波の交差した超音波ビームを用いる新たなコントラストエコー法
渡辺 好章; 江浦太之; 吉元直樹; 吉田憲司; 渡辺好章; 秋山いわき
超音波TECHNO, 日本工業出版, 21(2) 112 - 116, 2009 - 2P7b-3 Bi-frequency driven transducers for multi-frequency ultrasonic imaging(Poster Session)
Yoshizumi Natsuki; Saito Shigemi; Koyama Daisuke; Nakamura Kentaro; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 29 293 - 294, 11 Nov. 2008 - Multi-frequency Ultrasonic Imaging
AKIYAMA Iwaki
Japanese journal of medical ultrasonics = 超音波医学, 35 S180 , 15 Apr. 2008 - 超音波イメージングの最前線
秋山 いわき; 金井 浩
Japanese journal of medical ultrasonics = 超音波医学, 35 S179 , 15 Apr. 2008 - Nonlinear Acoustic Field of Composite-Type Two-Frequency Coaxial Focusing Source
斎藤 繁実; 秋山 いわき; 吉住 夏輝
Journal of the College of Marine Science and Technology, Tokai University, Tokai University, 6 107 - 117, 31 Mar. 2008 - Sum frequency component generated at the crossing region of dual frequency ultrasound beams : Applying to contrast echo imaging
YOSHIMOTO Naoki; YOSHIDA Kenji; WATANABE Yoshiaki; AKIYAMA Iwaki
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 107(468) 53 - 58, 22 Jan. 2008 - Rescue radar system with array antennas
Toshio Takeuchi; Hideo Saito; Yoshimitsu Aoki; Akihisa Ohya; Fumitoshi Matsuno; Iwaki Akiyama
IECON Proceedings (Industrial Electronics Conference), IEEE Computer Society, 1782 - 1787, 2008 - Measurement of Survivor Location by using GPR with Two Dimensional Array Antenna
Toshio Takeuchi; Hideo Saito; Yoshimitsu Aoki; Akihisa Ohya; Fumitoshi Matsuno; Iwaki Akiyama
2008 PROCEEDINGS OF SICE ANNUAL CONFERENCE, VOLS 1-7, IEEE, 2000 - +, 2008 - 2-08P-42 A new contrast echo imaging method using the crossed beams of two ultrasonic frequencies(Poster session 2)
Yoshimoto Naoki; Yoshida Kenji; Watanabe Yoshiaki; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 28 277 - 278, 14 Nov. 2007 - 2-08P-41 Acoustic characteristics of bi-frequency drive annular transducers(Poster session 2)
Yoshizumi Natsuki; Saito Shigemi; Koyama Daisuke; Nakamura Kentaro; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 28 275 - 276, 14 Nov. 2007 - Phased array ultrasonic imaging system for medical use
秋山 いわき
非破壊検査, 日本非破壊検査協会, 56(10) 504 - 509, Oct. 2007 - Doppler Modulation Ultrasonic Probe
YOSHIZUMI Natsuki; AKIYAMA Iwaki; OHYA Akihisa; SAITO Shigemi
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 107(96) 17 - 22, 19 Jun. 2007 - Multi-frequency Ultrasonic Imaging by Nonlinear Effects
YOSHIZUMI Natsuki; AKIYAMA Iwaki; OHYA Akihisa; SAITO Shigemi
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 107(75) 15 - 20, 23 May 2007 - Two Frequencies of Ultrasonic Waves Transmission Ultrasonic Imaigng
AKIYAMA Iwaki; OHYA Akihisa; SAITO Shigemi
Journal of medical ultrasonics = 超音波医学, 34 S309 , 15 Apr. 2007 - Ultrasonic Imaging by Transmitting Pulsed Waves of Two Frequency : Calculation of Secondary Waves
AKIYAMA Iwaki; SAITO Shigemi
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 106(481) 23 - 28, 18 Jan. 2007 - Search for survivors buried in rubble by rescue radar with array antennas - Extraction of respiratory fluctuation -
Iwaki Akiyama; Natsuki Yoshizumi; Akihisa Ohya; Yoshimitsu Aoki; Fumitoshi Matsuno
SSRR2007 - IEEE International Workshop on Safety, Security and Rescue Robotics Proceedings, 2007 - P1-49 Computation for Secondary Wave of Two Frequency Ultrasound Propagating in Biological Tissues(Poster session 1)
Akiyama Iwaki; Saito Shigemi
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 27 141 - 142, 15 Nov. 2006 - Ultra Broadband Ultrasonic Imaging : Multi-beam Method by Using Higher Order Harmonic Components
AKIYAMA Iwaki
The Journal of the Institute of Electronics, Information and Communication Engineers, The Institute of Electronics, Information and Communication Engineers, 89(10) 901 - 905, 01 Oct. 2006 - Ultra-broadband Ultrasonic Imaging : Generation of Harmonic Beam by Transducer Divided into Bi-frequency
AKIYAMA Iwaki; OHYA Akihisa; SAITO Shigemi
IEICE technical report, The Institute of Electronics, Information and Communication Engineers, 105(553) 1 - 6, 19 Jan. 2006 - 水中・音響 エコー信号における高次高調波を用いるスペックルノイズの軽減法--二次元モデルによる理論的解析
秋山 いわき; 大矢 晃久; 斎藤 繁美
超音波techno, 日本工業出版, 17(5) 40 - 45,127, Sep. 2005 - Tissue Harmonic Imaging
AKIYAMA Iwaki
Journal of medical ultrasonics = 超音波医学, 32(4) 391 - 400, 15 Jul. 2005 - Automated Extraction of Breast Tumor by Bubble Filling Method
AKIYAMA Iwaki; TAKIZAWA Yuki; Ohashi Gosuke; KAWASAKI Hiroaki; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 105(135) 1 - 6, 17 Jun. 2005 - 超音波診断(第1回)超広帯域超音波イメージング
秋山 いわき
映像情報medical, 産業開発機構, 37(5) 514 - 517, May 2005 - Speckle reduction by summation of higher order harmonic images
AKIYAMA Iwaki; OHYA Akihisa
Japanese journal of medical ultrasonics = 超音波医学, 32 S258 , 15 Apr. 2005 - A new system for in vivo assessment of the degree of nonlinear generation using the second harmonic component in the echo signals
FUJII Yasutomo; TANIGUCHI Nobuyuki; AKIYAMA Iwaki; TSAO Jing-Wen; KOIBUCHI Harumi; ONO Tomoko; OMOTO Kiyoka; ITOH Kouichi
Japanese journal of medical ultrasonics = 超音波医学, (公社)日本超音波医学会, 32(Suppl.) S299 - S299, 15 Apr. 2005 - Development of Ultra Broadband Ultrasonic Imaging System : Prototype of Mechanical Sector Equipment
AKIYAMA Iwaki; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 105(5) 13 - 17, 08 Apr. 2005 - Speckle reduction method using higher order harmonic components in echo signals : Theoretical analysis by two dimensional model
AKIYAMA Iwaki; OHYA Akihisa
日本音響学会研究発表会講演論文集, 2005(1) 717 - 718, 08 Mar. 2005 - On The Speckle Reduction Using Higher Order Harmonic Components in Echo Signals : Theoretical Analysis Based on Two Dimensional Model
AKIYAMA Iwaki; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 104(613) 7 - 10, 28 Jan. 2005 - Enhancement of Stents Using Interference of Low-frequency Ultrasonic Echo Signals
OHASHI Gosuke; OHYA Akihisa; TOBISE Kazunobu; AKIYAMA Iwaki
Journal of medical ultrasonics = 超音波医学, 31(6) J431 - J438, 15 Nov. 2004 - P3-34 Ultrasonic imaging using higher order harmonic components of echo
Akiyama Iwaki; Ohya Akihisa; Saito Shigemi
Proceedings of Symposium on Ultrasonic Electronics, Steering committee of symposium on ultrasonic electronics, 25 405 - 406, 27 Oct. 2004 - Contour Extraction Tool Using Ultrasound Echographic Motion Images
TAKIZAWA Yuki; AKIYAMA Iwaki; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 104(142) 1 - 4, 18 Jun. 2004 - Development of Ultra Broadband Ultrasonic Imaging System
AKIYAMA Iwaki; YAMAMOTO Hiroyuki; OHYA Akihisa
Journal of medical ultrasonics = 超音波医学, 31 S103 , 15 Apr. 2004 - Ultra Broadband Ultrasonic Imaging : Bi-layer Transmission And Reception Separate Type Probe
YAMAMOTO H.; AKIYAMA I.; SAITO S.; OHYA A.
日本音響学会研究発表会講演論文集, 2004(1) 1089 - 1090, 17 Mar. 2004 - Ultra Broadband Ultrasonic Imaging : Harmonic Generation and Detection by Bi-layer Type Probe
AKIYAMA Iwaki; YAMAMOTO Hiroyuki; OHYA Akihisa; OHASHI Gosuke; SAITO Shigemi
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 103(608) 73 - 78, 21 Jan. 2004 - Ultra Broadband Ultrasonic Imaging
YAMAMOTO Hiroyuki; AKYAMA Iwaki; OHASHI Gosuke; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 103(377) 27 - 30, 23 Oct. 2003 - Formation of Higher Order Harmonic Images by Using Divided Probe between Transmitting and Receiving Transducer and Speckle Reduction of B-mode Image
YAMAMOTO Hiroyuki; AKIYAMA Iwaki; OHASHI Gosuke; OHYA Akihisa
日本音響学会研究発表会講演論文集, 2003(2) 1165 - 1166, 17 Sep. 2003 - Preface for the special issue on "Recent technology on medical ultrasonics"
AKIYAMA Iwaki
The Journal of the Acoustical Society of Japan, The Acoustical Society of Japan (ASJ), 59(9) 550 - 551, 01 Sep. 2003 - Formation of Higher Order Harmonic Images and Application Using Divided Probe between Transmission and Reception
YAMAMOTO Hiroyuki; AKIYAMA Iwaki; OHASHI Gosuke; OHYA Akhisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 103(158) 11 - 15, 21 Jun. 2003 - Study of the Automated Breast Tumor Extraction Using 3D Ultrasound Imaging : The Usefulness of Depth-Width Ratio and Surface-Volume Index
OMOTO Kiyoka; ITOH Kouichi; CHENG Xiangyong; WANG Yi; TANIGUCHI Nobuyuki; AKIYAMA Iwaki; OTSUKA Shin; MIZUNUMA Hirobumi; OGURA Shigeto; KANAZAWA Kyotaro
J Med Ultrasonics, 30(2) 103 - 110, 15 Jun. 2003 - Ultrasonographic Evaluation Using the Internal Echo in Normal and Cirrhotic Livers : Comparison of Accuracy of Gray-Scale and Binary Black-and-White Images and Their Intraobserver Reproducibility and Interobserver Agreement
WANG Yi; TANIGUCHI Nobuyuki; ITOH Kouichi; FUJII Yasutomo; SHIGETA Kouichirou; OMOTO Kiyoka; AKIYAMA Iwaki
J Med Ultrasonics, 30(1) 21 - 29, 15 Mar. 2003 - Formation of Higher Order Harmonic Images and Speckle Reduction Using Divided Probe between Transmission and Reception
YAMAMOTO Hiroyuki; OZAWA Akio; AKIYAMA Iwaki; OHASHI Gosuke; OHYA Akhisa
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 102(607) 49 - 52, 21 Jan. 2003 - E-6 Speckle reduction of ultrasonic echographic image by nonlinear effect
Akiyama Iwaki; Yamamoto Hiroyuki; Ozawa Akio; Ohashi Gosuke; Ohya Akihisa
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (23) 247 - 248, 07 Nov. 2002 - On The Summation of Higher Order Harmonic Images for Speckle Reduction
YAMAMOTO Hiroyuki; OZAWA Akio; AKIYAMA Iwaki; OHASHI Gosuke; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 102(411) 19 - 24, 18 Oct. 2002 - Ultrasonic Echo Signal Processing for Enhancement of Stent
AKIYAMA Iwaki; ARAI Satoshi; OHASHI Gosuke; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 102(411) 13 - 18, 18 Oct. 2002 - Three Dimensional Image Analysis for Breast Cancer Screening using Ultrasonic Imaging Techniques
MATSUDAIRA Hironori; KAWASAKI Hiroaki; OMOTO Kiyoka; ITO Koiti; AKIYAMA Iwaki
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 102(411) 25 - 30, 18 Oct. 2002 - Coding Method for Ultrasonic Echographic Images using Statistical Properties
AKIYAMA Iwaki; MORI Yusuke; MORI Yusuke; OHASHI Gosuke; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 102(170) 13 - 17, 21 Jun. 2002 - Speckle Reduction using Higher Order Harmonic Images : Development of The Probe with Transmitting And Receiving Transducers
AKIYAMA Iwaki; MORI Yusuke; OHASHI Gosuke; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 102(67) 51 - 58, 13 May 2002 - 超音波診断装置の課題 スペックルリダクション (総特集 超音波検査50年と最新技術の現況) -- (超音波半世紀)
秋山 いわき
月刊新医療, エム・イー振興協会 ; 1975-, 29(5) 43 - 45, May 2002 - Image Coding Method for Ultrasonic Echography on Speckle Statistics : Application to Motion Picture
KASHIWAGI T.; OHYA A.; OHASHI G.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 2002(1) 1175 - 1176, 18 Mar. 2002 - Image Coding Method for Ultrasonic Echography on Speckle Statistics
OHYA A.; OHASHI G.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 2002(1) 1173 - 1174, 18 Mar. 2002 - Speckle Noise Reduction of Ultrasonic B-mode Image by Summation of Higher Order Harmonic Images
MORI Yusuke; OHYA Akihisa; OHASHI Gosuke; AKIYAMA Iwaki
日本音響学会研究発表会講演論文集, 2002(1) 1163 - 1164, 18 Mar. 2002 - On The Transmitting Ultrasonic Waveform for Observation of Stent through Echography
TOBISE K.; OHYA A.; OHASHI G.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 2002(1) 1171 - 1172, 18 Mar. 2002 - Speckle Reduction by Summation of Higher Order Harmonic Images
AKIYAMA Iwaki; MORI Yusuke; OHASHI Gosuke; OHYA Akihisa
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 101(597) 33 - 39, 17 Jan. 2002 - A Method for Data Compression of Medical Ultrasonic Echograms
OHYA Akihisa; OHASHI Gosuke; AKIYAMA Iwaki
The Transactions of the Institute of Electronics,Information and Communication Engineers. A, The Institute of Electronics, Information and Communication Engineers, 84(12) 1469 - 1474, 01 Dec. 2001 - Ultrasonic Imaging with Narrow Aperture Phased Array
TAKIZAWA Naoki; OHYA Akihisa; AKIYAMA Iwaki
The Transactions of the Institute of Electronics,Information and Communication Engineers. A, The Institute of Electronics, Information and Communication Engineers, 84(12) 1516 - 1524, 01 Dec. 2001 - A Study on Speckle Tracking Method for Three Dimensional Ultrasonic Imaging
OHASHI Gousuke; TOYODA Toshiyuki; OHYA Akihisa; AKIYAMA Iwaki
The Transactions of the Institute of Electronics,Information and Communication Engineers. A, The Institute of Electronics, Information and Communication Engineers, 84(12) 1484 - 1491, 01 Dec. 2001 - Displacement Vector Measurement Using Ultrasound Speckle
OHASHI Gosuke; OHYA Akihisa; AKIYAMA Iwaki
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 101(377) 43 - 48, 15 Oct. 2001 - Speckle Tracking Method for Measurement of Displacement Vectors of Ultrasonic Echographic Images.
AKIYAMA Iwaki; OHASHI Gosuke; OHYA Akihisa
日本音響学会研究発表会講演論文集, 2001(2) 1263 - 1264, 01 Oct. 2001 - Study of Automated Breast Tumor Extraction and Diagnosis Using Three-Dimensional Ultrasonic Imaging : Multivariate Logistic Regression Analysis with Multiple Parameters
OMOTO Kiyoka; ITOH Kouichi; CHENG Xiangyong; WANG Yi; TANIGUCHI Nobuyuki; AKIYAMA Iwaki; OTSUKA Shin; MIZUNUMA Hirobumi; OGURA Shigeto; KANAZAWA Kyotaro
Journal of medical ultrasonics : official journal of the Japan Society of Ultrasonics in Medicine, 28(2) 49 - 58, 15 Jun. 2001 - Study of Automated Breast Tumor Extraction and Diagnosis Using Three-Dimensional Ultrasound Imaging : Clinical Evaluation for Accuracy of Extraction with New Algorithms and Two Equipments
OMOTO K.; WANG Y.; TANIGUCHI N.; ITOH K.; MIZUNUMA H.; HOZUMI Y.; NAGAI H.; AKIYAMA I.; LIU X-Q; KAWASAKI H.
J Med Ultrasonics, 28(3) J649 , 15 Apr. 2001 - ULTASONIC TOMOGRAPHY BY NARROW APERTURE PHASED ARRAY
Akiyama Iwaki; Tamahashi Takahiro; Ohya Akihisa
Proceedings of the IEICE General Conference, The Institute of Electronics, Information and Communication Engineers, 2001 479 - 480, 07 Mar. 2001 - Breast Cancer Screening System using 3D Ultrasonic Echography
AKIYAMA Iwaki; OMOTO Kiyoka; ITOH Koichi; OHYA Akihisa
日本音響学会研究発表会講演論文集, 2001(1) 1087 - 1088, 01 Mar. 2001 - 3D Ultrasonic Imaging by NAPA-CT : On the Image Reconstruction Area Transmitting through Layers of Inhomogeneous Media
AKIYAMA Iwaki; TAMAHASHI Takahiro; OHYA Akihisa
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 100(581) 21 - 26, 19 Jan. 2001 - Ultrasonic Imaging in Three Dimension for Medical Diagnosis
AKIYAMA Iwaki
振動・音響新技術シンポジウム講演論文集, 日本機械学会, 2001 256 - 259, 2001 - RK01 On the reconstructed image of NAPA-CT in heterogeneous media
Akiyama I.; Tamahashi T.; Ohya A.
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (21) 323 - 324, 06 Nov. 2000 - Three Dimensional Reconstruction of Echographic Images : Tracking of Speckle Pattern by Cross Correlation
AKIYAMA Iwaki; TOYODA Toshiyuki; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 100(333) 37 - 42, 04 Oct. 2000 - Fast Three Dimensional Imaging using Narrow Aperture Phased Array Computed Tomography
AKIYAMA I.; TAMAHASHI T.; OHYA A.
日本音響学会研究発表会講演論文集, 2000(2) 1087 - 1088, 01 Sep. 2000 - Study of Automated Breast Tumor Extraction and Diagnosis Using Three-Dimensional Ultrasound Imaging : Clinical Evaluation of Preoperative Predictability by Malignancy Probability Expression
OMOTO Kiyoka; ITOH Kouichi; CHENG Xiangyong; WANG Yi; TANIGUCHI Nobuyuki; AKIYAMA Iwaki; OTSUKA Shin; MIZUNUMA Hirobumi; OGURA Shigeto; NAGAI Hideo
Journal of medical ultrasonics = 超音波医学, 27(8) 1043 - 1048, 15 Aug. 2000 - Preface to the special issue
AKIYAMA Iwaki
The Journal of the Acoustical Society of Japan, The Acoustical Society of Japan (ASJ), 56(7) 497 - 497, 01 Jul. 2000 - Study of Automated Breast Tumor Extraction and Diagnosis Using Three-Dimensional Ultrasound Imaging-Comparison between CAD by this System and Doctor's Diagnosis in the Preoperative Predictability-
OMOTO K.; ITOH K.; CHENG X-Y.; WANG Y.; TANIGUCHI N.; AKIYAMA I.; OTSUKA S.; MIZUNUMA H.; OGURA S.; NAGAI H.
Journal of medical ultrasonics = 超音波医学, 27(4) 408 - 408, 15 Apr. 2000 - Breast tumor diagnostic system using neural network
KAWAURA Y.; OHYA A.; OHASHI G.; CHENG X.; ITOH K.; OMOTO K.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 2000(1) 1081 - 1082, 01 Mar. 2000 - On the degradation of harmonic image by heterogeneous layers
FUKUCHI N.; OHYA A.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 2000(1) 1069 - 1070, 01 Mar. 2000 - Narrow aperture phased array computed tomography system
TAKIZAWA N.; OHYA A.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 2000(1) 1035 - 1036, 01 Mar. 2000 - Study of Automated Breast Tumor Extraction and Diagnosis Using Three-Dimensional Ultrasonic Imaging : Multivariate Logistic Regression Analysis with Multiple Parameters
OMOTO Kiyoka; ITOH Kouichi; CHENG Xiangyong; WANG Yi; TANIGUCHI Nobuyuki; AKIYAMA Iwaki; OTSUKA Shin; MIZUNUMA Hirobumi; OGURA Shigeto; KANAZAWA Kyotaro
Journal of medical ultrasonics = 超音波医学, 27(2) 119 - 129, 15 Feb. 2000 - Second Harmonic Beam Degradation in Heterogeneous Media
AKIYAMA Iwaki; FUKUCHI Norio; OHYA Akihisa
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 99(589) 29 - 34, 26 Jan. 2000 - Ultrasonic Imaging using Narrow Aperture Phased Array
KIYAMA Iwaki; TAKIZAWA Naoki; OHYA Akihisa
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 99(527) 9 - 16, 21 Dec. 1999 - Study of the Breast Tumor Extracted Automatedly by 3 D Ultrasound Imaging : Usefulness of Parameters : Depth-Width Ratio and Surface-Volume Ratio Index
OMOTO Kiyoka; ITOH Kouichi; CHENG Xiangyong; WANG Yi; TANIGUCHI Nobuyuki; AKIYAMA Iwaki; OTSUKA Shin; MIZUNUMA Hirohumi; OGURA Shigeto; KANAZAWA Kyotaro
Journal of medical ultrasonics = 超音波医学, 26(12) 1197 - 1204, 01 Dec. 1999 - G-2 Narrow aperture phased array computed tomography : Development of imaging system using concave acoustic lens
Takizawa N.; Ohya A.; Akiyama I.
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (20) 311 - 312, 17 Nov. 1999 - 医用超音波トモグラフィー (平成10年度〔海洋音響学会〕第2回シンポジウム発表要旨)
秋山 いわき
海洋音響学会誌, 海洋音響学会, 26(4) 218 - 221, Oct. 1999 - Calculate of Sound Field by Naroow Aperture Phased Array.
TAKIZAWA N.; OHYA A.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 1999(2) 1169 - 1170, 01 Sep. 1999 - Ultrasonic Tomography Using Narrow Aperture Phased Array Method : Relation of Aperture Width to Spatial Resolution
TAKIZAWA Naoki; OHYA Akihisa; AKIYAMA Iwaki
電気学会研究会資料. MBE, 医用・生体工学研究会, 1999(21) 7 - 12, 26 Jun. 1999 - Study of the breast tumor extracted automatically by 3D ultrasound imaging : usefulness of dmax^3/Vt, Sz/Sxy and Minkovski dimension
OMOTO K.; ITOH K.; CHENG X.; WANG Y.; TANIGUCHI N.; AKIYAMA I.; OHTSUKA S.; MIZUNUMA H.; KANAZAWA K.; KAWAI F.
Journal of medical ultrasonics = 超音波医学, 26(4) 653 - 653, 15 Apr. 1999 - Study of the breast tumor extracted automatically by 3D ultrasound imaging : usefulness of depth width ratio and surface volume ratio
OMOTO K.; ITOH K.; CHENG X.; WANG Y.; TANIGUCHI N.; AKIYAMA I.; OHTSUKA S.; MIZUNUMA H.; KANAZAWA K.; KAWAI F.
Journal of medical ultrasonics = 超音波医学, 26(4) 320 - 320, 15 Apr. 1999 - Ultrasonic CT Using Narrow Aperture Phased Array : Aperture and beam broadening
TAKIZAWA N.; OHYA A.; AKIYAMA I.
Journal of medical ultrasonics = 超音波医学, 26(4) 691 - 691, 15 Apr. 1999 - Tumor shape evaluation using Neural Network
OGAWA S.; AKIYAMA I.; ITOH K.; OMOTO K.; OHYA A.
日本音響学会研究発表会講演論文集, 1999(1) 1111 - 1112, 01 Mar. 1999 - Tissue Characterization Using Ultrasonic Echography -Color-coding of Texture through Wavelet Transform-
TAMARU T.; AKIYAMA I; NAKAJIMA M.
日本音響学会研究発表会講演論文集, 1999(1) 1113 - 1114, 01 Mar. 1999 - Method for Three-dimensional Display of Blood Vessel in Liver -Higher Quality Imaging-
URYU T.; AKIYAMA I; NAKAJIMA M
日本音響学会研究発表会講演論文集, 1999(1) 1115 - 1116, 01 Mar. 1999 - On the Image using Second Harmonic Component of Echoes
KUAMAZAWA T.; AKIYAMA I.; OHYA A.
日本音響学会研究発表会講演論文集, 1999(1) 1121 - 1122, 01 Mar. 1999 - On The Second Harmonic Components in Echo Signal : Measurement of Acoustic Nonlinearity Parameter
AKIYAMA Iwaki; OHYA Akihisa
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 98(532) 17 - 21, 22 Jan. 1999 - エコー信号における第2高調波と生体組織の音響的非線形性について
秋山いわき
Journal of Medical Ultrasonics, 26(4) 282 - 282, 1999 - New ultrasonic imaging using nonlinear acoustics
AKIYAMA Iwaki
The Journal of the Acoustical Society of Japan, The Acoustical Society of Japan (ASJ), 54(10) 739 - 743, 01 Oct. 1998 - SYNTHETIC APERTURE TOMOGRAPHIC IMAGING USING ULTRASOUND
AKIYAMA Iwaki; TAKIZAWA Naoki; OHYA Akihisa
Medical imaging technology, 16(4) 347 - 349, 25 Jul. 1998 - Breast Tumor Diagnosis System Using Three Dimensional Ultrasonic Echography
CHENG Xiangyong; AKIYAMA Iwaki; WANG Yi; ITOH Kouichi
The Transactions of the Institute of Electronics,Information and Communication Engineers., The Institute of Electronics, Information and Communication Engineers, 81(6) 1402 - 1410, Jun. 1998 - Automated Boundary Extraction of the Breast Tumor Using 3D by Ultrasound Imaging
WANG Y.; ITOH K.; TEI S.; OMOTO K.; TANIGUCHI N.; AKIYAMA I.; OHTSUKA S.; MIZUNUMA H.; KAWAI F.; KANAZAWA K.
J Med Ultrasonics, 25(4) 575 - 575, 15 Apr. 1998 - Three Dimensional Imaging Using Pulse Echo Ultrasonic CT System
TAKIZAWA N.; AKIYAMA I.
Journal of medical ultrasonics = 超音波医学, 25(4) 487 - 487, 15 Apr. 1998 - Study of the breast tumor extracted automatically by 3D ultrasound imaging : comparison with three parameters in the tumor (less than 20mm in diameter)
OMOTO K.; ITOH K.; TEI S.; WANG Y.; TANIGUCHI N.; AKIYAMA I.; OHTSUKA S.; MIZUNUMA H.; KANAZAWA K.; KAWAI F.
Journal of medical ultrasonics = 超音波医学, 25(4) 356 - 356, 15 Apr. 1998 - Evaluation of Morphology for Breast Tumor using Three Dimensional Echography
OGAWA S.; ITOH K.; OMOTO K.; WANG Y.; AKIYAMA I.
Journal of medical ultrasonics = 超音波医学, 25(4) 342 - 342, 15 Apr. 1998 - Ultrasonic Probe Tracking System -Three Dimensional Position Measurement-
SHIROTA K.; AKIYAMA I.; OHYA A.
日本音響学会研究発表会講演論文集, 1998(1) 945 - 946, 01 Mar. 1998 - Discussion of Pulsed echo Ultrasonic CT.
TAKIZAWA N.; AKIYAMA I.; OHYA A.
日本音響学会研究発表会講演論文集, 1998(1) 903 - 904, 01 Mar. 1998 - Characterization of tumor morphology using echogram -Relation of the Minkowski Dimension to Malignant tumor-
OGAWA S.; AKIYAMA I.; ITOH K.
日本音響学会研究発表会講演論文集, 1998(1) 895 - 896, 01 Mar. 1998 - Breast Tumor Diagnosis System Using Three Dimensional Ultrasonic Images
CHENG Xiangyong; OGAWA Syuji; AKIYAMA Iwaki; ITOH Kouichi; OMOTO Kiyoka; WANG Yi
Technical report of IEICE. EA, The Institute of Electronics, Information and Communication Engineers, 97(515) 39 - 47, 29 Jan. 1998 - 第2高調波を利用した非線形音響イメージング
秋山いわき
超音波医学, 25 325 - 326, 1998 - エコー信号における第2高調波について
秋山いわき
音響論集, 913, 1998 - On the second harmonic component in echo signal
AKIYAMA I.
Proc. Spring Meet. Acoust. Soc. Jpn., 913 - 914, 1998 - Three Dimensional Ultrasonic CT by Pulse-echo Technique
TAKIZAWA Naoki; AKIYAMA Iwaki
US97-67, The Institute of Electronics, Information and Communication Engineers, 97(333) 45 - 50, 23 Oct. 1997 - Extraction of Breast Tumors Using Fuzzy Reasoning - Automated Generation of Membership Functions -
CHENG X. -Y.; ITOH K.; OMOTO K.; WANG Y.; TANIGUCHI N.; OTSUKA S.; MIZUNUMA H.; KANAZAWA K.; OGAWA S.; AKIYAMA I.
J Med Ultrasonics, 24(9) 406 - 406, 15 Sep. 1997 - Three dimensional imaging by reflection mode ultrasound computed tomography
AKIYAMA Iwaki; TAKIZAWA Naoki
日本音響学会研究発表会講演論文集, 1997(2) 1019 - 1020, 01 Sep. 1997 - 総論 進歩した超音波医学と将来像 (特集:進歩した超音波医学と将来像(臨床診断を支える超音波技術))
秋山 いわき
超音波techno, 日本工業出版, 9(5) 1 - 4, May 1997 - Automated Detection of Breast Tumors in Echographic Images
CHENG X. Y.; AKIYAMA I.; ITOH K; WANG Y.; TANIGUCHI N.; OOTSUKA S.; MIZUNUMA H.; KANAZAWA K.; NAKAJIMA M.
J Med Ultrasonics, 24(3) 576 - 576, 15 Mar. 1997 - High resolution ultrasonic computed tomography by filtered backprojection method
AKIYAMA Iwaki; YANO Kiyoshi
電子情報通信学会技術研究報告. EA, 応用音響, 96(474) 9 - 15, 24 Jan. 1997 - Ultrasonic Emission CT Using Divergent Waves
AKIYAMA Iwaki; YANO Kiyoshi
US, The Institute of Electronics, Information and Communication Engineers, 96(320) 9 - 16, 22 Oct. 1996 - Automated Boundary Extraction of the Prostate Using 3D Laplacian of Gaussian Filters
OHHASHI Gousuke; KAWASAKI Ikuyo; AKIYAMA Iwaki; NAKAJIMA Masato
Japanese journal of medical ultrasonics = 超音波医学, 23(10) 17 - 24, 15 Oct. 1996 - Ultrasonic Emission CT by Divergent Waves
AKIYAMA Iwaki
日本音響学会研究発表会講演論文集, 1996(2) 975 - 976, 01 Sep. 1996 - Ultrasonic Three Dimensional Target Tracking by Phase Shift Detection
AKIYAMA I.
日本音響学会研究発表会講演論文集, 1996(2) 911 - 912, 01 Mar. 1996 - Ultrasonic Transmission Probing System for Interlocking Nailing Surgery
MAKINO K.; TAKAGISHI K.; ITOMAN M.; NAKANISHI K.; AKIYAMA I.
日本音響学会研究発表会講演論文集, 1996(2) 1087 - 1088, 01 Mar. 1996 - On the relation of self-similarity of biological tissues to the echographic images
AKIYAMA I.; TANIGUCHI N.; ITOH K.
IEICE technical report. Ultrasonics, The Institute of Electronics, Information and Communication Engineers, 95(339) 39 - 46, 26 Oct. 1995 - Correction of Transmission Disturbance at Boundary for Backward Propagation Imaging System
秋山 いわき
湘南工科大学紀要 = Memoirs of Shonan Institute of Technology, 湘南工科大学, 29(1) 11 - 15, 25 Mar. 1995 - 超音波断層映像系と組織診断
秋山 いわき
BME : bio medical engineering, 9(2) 33 - 39, 10 Feb. 1995 - PA-16 Computer Simulation of Ultrasonic B-mode Images Considering Selfsimilarity of Tissue Structures
Akiyama Iwaki; Ohya Akihisa; Taniguchi Nobuyuki; Itoh Koichi
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (15) 61 - 62, 28 Nov. 1994 - Three-Dimensional Display Method for Ultrasonic Echo Image - Stereoscopic Echography for Display of Superimposed Image of Cross Section and Projection -
OHYA Akihisa; AMADA Hiroyuki; HATTORI Katsuya; ITOH Kouichi; AKIYAMA Iwaki
The Transactions of the Institute of Electronics,Information and Communication Engineers., The Institute of Electronics, Information and Communication Engineers, 76(12) 2649 - 2651, 25 Dec. 1993 - Ultrasonic Speckle Velocimetry for Measurement of Vehicle Ground Speed
UCHIZAWA Toshio; HYUUGA Shunichirou; AKIYAMA Iwaki
The Transactions of the Institute of Electronics, Information and Communication Engineers. A, The Institute of Electronics, Information and Communication Engineers, 76(7) 986 - 987, 25 Jul. 1993 - 超音波像のフラクタル解析による組織性状診断の可能性
秋山いわき
超音波医学, 20 643 - 652, 1993 - PA17 Nonlinearity Parameter B/A Mapping using Nonlinear Interaction of Ultrasonic Echo Signals to Puming wave
Akiyama Iwaki; Kubonoya Hideaki; Ohya Akihisa
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (13) 65 - 66, 30 Nov. 1992 - ホログラフィによる超音波エコー像の立体表示
秋山いわき
日本超音波医学会基礎技術研究部会資料, 91 9 - 14, 1992 - 3H-2 Reflection Imaging of Nonlinearity Parameter Distribution
Akiyama I.; Koide T.; Kumakura Y.
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (11) 181 - 182, 20 Nov. 1990 - Correction of Diffraction Effects on the Measurement of Acoustic Nonlinearity Parameter by Reflection Mode Method
秋山 いわき
相模工業大学紀要 = Memoirs of Sagami Institute of Technology, 湘南工科大学, 24(1) 19 - 22, 31 Mar. 1990 - Velocity measurement of moving rough surface using ultrasonic speckle fluctuation in echo signals
Akiyama Iwaki; Miyazaki Fumio; Momokawa Hiroshi
The Journal of the Acoustical Society of Japan, The Acoustical Society of Japan (ASJ), 46(1) p28 - 32, Jan. 1990 - B-12 Airborne ultrasound speckle velocimetry
Akiyama I.; Miyazaki F.; Momokawa H.
Symposium on ultrasonic electronics, Steering committee of symposium on ultrasonic electronics, (9) 55 - 56, 07 Dec. 1988 - A Method of Reducing Speckle Noises Appeared in Ultrasound Tomographic Image
高橋 貴順; 秋山 いわき
相模工業大学紀要 = Memoirs of Sagami Institute of Technology, 湘南工科大学, 22(1) 29 - 34, 26 Mar. 1988 - Vectorial Measurement of Displacement in Biological Tissues from Ultrasound Tomographic Images
秋山 いわき
相模工業大学紀要 = Memoirs of Sagami Institute of Technology, 湘南工科大学, 22(1) 23 - 28, 26 Mar. 1988
Books etc
- 例題で学ぶ基礎電気回路
森北出版, 2015 - アコースティックイメージング
コロナ社, 2010 - Acoustical Imaging Vol.29
AKIYAMA Iwaki
Springer, Oct. 2009, Editor
Presentations
- 超音波照射下における骨格筋細胞の筋合成に関する研究
中村椋介; 市川寛; 牧田ひかる; 氏政かりん; 南山幸子; 秋山いわき
日本超音波医学会関西地方会第46回学術集会, 26 Oct. 2019, Oral presentation - メダカ胚プロテオーム解析による 発生期の超音波照射影響の研究
西野 嘉晃; 池川 雅哉; 岩崎; 了教; 秋山; いわき; 高柳 真司
日本超音波医学会関西地方会第46回学術集会, 26 Oct. 2019, Oral presentation - Bioeffects of ultrasound with long pulse duration during administration of contrast agents
AKIYAMA Iwaki
World Federation for Ultrasound in Medicine and Biology, 06 Sep. 2019, Nominated symposium - Measurement of sound velocity change due to ultrasonic heating
AKIYAMA Iwaki
World Federation for Ultrasound in Medicine and Biology, 06 Sep. 2019, Nominated symposium - 左室補助人工心臓の塞栓リスク評価：超音波による血栓と気泡の検出
北村公汰
日本超音波医学会第92回学術集会, 25 May 2019, Oral presentation - 超音波とMRIを用いたMRマーカーによるプローブの電子フォーカス
滑川賢吾
日本超音波医学会第92回学術集会, 25 May 2019, Oral presentation - MRと超音波によるマルチモダリティイメージング
加藤聖子
日本超音波医学会第92回学術集会, 24 May 2019, Nominated symposium - 造影剤投与後の音響放射力インパルスを伴う超音波照射による 期外収縮の誘発
利府数馬
日本超音波医学会第92回学術集会, 24 May 2019, Oral presentation - 音響放射力インパルスによるウサギの肺損傷について
高山法也
日本超音波医学会第92回学術集会, 24 May 2019, Oral presentation - Estimation of the thermo-physical property of biological tissues from temperature rise due to ultrasound exposure.
TSUJIMOTO Yukako; AKIYAMA Iwaki
Acoustical Society of America, 09 Nov. 2018, Oral presentation - Lung Hemorrhage induced by acoustic radiation force impulse elastography:A preliminary study in rabbits
TAKAYAMA Noriya; SASANUMA Hideki; RIFU Kazuma; FURUYA M; LEFOR K; AKIYAMA Iwaki; N.Taniguchi
EUROSON, 07 Sep. 2018, Poster presentation - Simultaneous Ultrasonic Imaging under Magnetic Resonance Imaging
AKIYAMA Iwaki
13th Congress of Asian Federation of Societies for Ultrasound in Medicine and Biology, 24 May 2018, Invited oral presentation - 造影剤投与後の音響放射力インパルスを伴う超音波照射による期外収縮の誘発
利府数馬; 笹沼英紀; 高山法也; 高野わかな; 石黒保直; 小形幸代; 秋山いわき; 谷口信行
超音波医学, 15 Apr. 2018 - 超音波照射によるメダカ胚のプロテオーム解析
池川雅哉; 松本恵李那; 吉田憲司; 秋山いわき; 廣瀬まゆみ; 渡辺好章
超音波医学, 15 Apr. 2018 - 音響放射力インパルスが肺に及ぼす影響―ウサギを用いた動物実験―
高山法也; 笹沼英紀; 利府数馬; 高野わかな; 石黒保直; 秋山いわき; 谷口信行
超音波医学, 15 Apr. 2018 - MRと超音波のマルチモダリティ・イメージング
秋山いわき; 新井慎平; 稲垣拳; 坂和直幸; 新田尚隆; 平井都始子
超音波医学, 15 Apr. 2018 - 高周波超音波の照射に伴うDNA分子の二重鎖切断
吉田憲司; 石原和也; 秋山いわき; 吉川研一; 渡辺好章
超音波医学, 15 Apr. 2018 - 音響放射力インパルスによる肺損傷についての検討―ウサギを用いた動物実験―
高山法也; 笹沼英紀; 利府数馬; 古屋元秀; 石黒保直; 秋山いわき; 谷口信行
日本超音波医学会関東甲信越地方会学術集会抄録集, 2018 - 造影剤投与後の音響放射力インパルスを伴う超音波照射による期外収縮の誘発
利府数馬; 笹沼英紀; 高山法也; 高野わかな; 石黒保直; 小形幸代; 秋山いわき; 谷口信行
日本超音波医学会関東甲信越地方会学術集会抄録集, 2018 - 音響放射力インパルスが肺に及ぼす影響―ウサギを用いた動物実験―
高山法也; 笹沼英紀; 利府数馬; 高野わかな; 新田尚隆; 石黒保直; 秋山いわき; 谷口信行
超音波医学, 15 Apr. 2017 - Effect on Rabbit Heart Exposure to Ultrasound with Long Pulse Duration
AKIYAMA Iwaki
International Congress on Ultrasonics, 2017 - 超音波照射による生体への影響について
秋山 いわき
第85回バイオメクフォーラム２１研究会, 2017 - Measurement of thermal properties of the biological tissues by ultrasonic heating
Yukako Tsujimoto; Mai Morimoto; Naotaka Nitta; Iwaki Akiyama
Artimino Conference, 2017 - 超音波加温による生体組織の熱物性の超音波測定
辻本祐加子; 森本 舞; 新田尚隆; 秋山いわき
日本超音波医学会第90回学術集会, 2017 - 超音波加温による生体組織の体積熱容量の測定
金山寛明; 杉山真璃子; 新田尚隆; 秋山いわき
日本超音波医学会第90回学術集会, 2017 - 超音波照射による DNA 分子の二重鎖切断
石原和也; 山下悠介; 吉田憲司; 秋山いわき; 剣持貴弘; 吉川裕子; 吉川研一; 渡辺好章
日本超音波医学会第90回学術集会, 2017 - 生体内部の音速分布を考慮した超音波イメージング －超音波とMRの同時撮像による音速分布の推定とその補正－
稲垣拳; 小南成史; 秋山いわき
日本音響学会2017年春季研究発表会, 2017 - MHz帯超音波照射に伴う巨大DNA分子の二重鎖切断の音圧依存性
山下悠介; 吉田憲司; 渡辺好章; 秋山いわき; 剣持貴弘; 吉川研一; 吉川祐子
日本音響学会2017年春季研究発表会, 2017 - fMRIを用いた情動想起時のコネクティビティの検討
岩田直樹; 奥谷晃久; 岩川幹生; 笹部孝司; 渡辺好章; 秋山いわき
2017年電子情報通信学会総合大会, 2017 - スパース撮像法を用いたfMRIと脳波計の同時計測の精度向上
畑田大翼; 内藤葵; 吉田祥子; 岩田直樹; 奥谷晃久; 岩川幹生; 笹部孝司; 渡辺好章; 秋山いわき
2017年電子情報通信学会総合大会, 2017 - MR高磁場環境下で用いる超音波イメージングの開発
新井慎平; 森泉裕貴; 小南成史; 稲垣拳; 二矢川和也; 秋山いわき
第56回日本生体医工学会大会, 2017 - 超音波照射されたメダカ胚のプロテオーム解析
松本恵李那; 吉田憲司; 秋山いわき; 廣瀬まゆみ; 池川雅哉; 渡辺好章
第2回アコースティックイメージング研究会, 2017 - 医用超音波照射によるDNA分子の二重鎖切断について
石原和也; 山下悠介; 吉田憲司; 秋山いわき; 渡辺好章; 吉川研一
第2回アコースティックイメージング研究会, 2017 - RIの画像情報を用いる音速推定のためのモデル式構築 －拡散係数有無による 影響及び有意性－
坂和直幸; 秋山いわき
日本超音波医学会第44回関西地方会学術集会, 2017 - 粘性内包物を含むファントムを用いたShear Wave Elastographyの検討
藤岡亮輔; 秋山いわき; 椎名毅; 山川誠; 近藤健悟; 浪田健
日本超音波医学会第44回関西地方会学術集会, 2017 - Ultrasonic imaging of sum frequency components by crossed beam contrast echo method.
KIHARA Ayane; KANAI Kazumasa AKIYAMA Iwaki
5th Joint Meeting of the Acoustical Society of America and Acoustical Society of Japan, 02 Dec. 2016, Oral presentation - Proposal of Ultrasonic Imaging of thermophysical property distribution in vivo by ultrasonic heating
M. Morimoto; Y. Tsujimoto; I. Akiyama
Acoustical Soceity of America, 02 Dec. 2016, Oral presentation - Measurement of volumetric heat capacity of biological tissues heated by ultrasound exposure,
M. Sugiyama; H. Kanayama; I. Akiyama
Acoustical Soceity of America, 01 Dec. 2016, Poster presentation - 音響放射力を伴う超音波による生体組織の温度上昇
秋山 いわき
Jpn J. Med. Ultrasonics, 2016 - 音響放射力インパルス（ARFI）を伴う超音波と期外収縮
秋山 いわき
Jpn J. Med. Ultrasonics, 2016 - MRで撮像された画像情報を用いた超音波イメージングの歪み補正
小南成史; 稲垣拳; 秋山いわき
日本超音波医学会第43回関西地方会学術集会, 2016 - MRIの画像情報を用いる音速推定のための予備実験
坂和直幸; 三原伸公; 秋山いわき
日本超音波医学会第89回学術集会, 2016 - FBGセンサによるMHz超音波音圧計測
松尾晃佑; 秋山いわき
日本超音波医学会第89回学術集会, 2016 - 骨表面組織における超音波照射による温度上昇について
高野わかな; 赤井一揮; 石黒保直; 谷口信行; 新田尚隆; 秋山いわき
日本超音波医学会第89回学術集会, 2016 - fMRIがEEGに及ぼすノイズの除去手法の検討,
岩田直樹; 奥谷晃久; 渡辺好章; 秋山いわき; 笹部孝司; 岩川幹生
電子情報通信学会2016年総合大会, 2016 - fMRI環境下におけるERP解析の研究
畑田大翼; 奥谷晃久; 長雄紅美; 渡辺好章; 秋山いわき; 笹部孝司; 岩川幹生
電子情報通信学会2016年総合大会, 2016 - 音響キャビテーション発生に伴うメダカ胚への影響
山田健人; 阪口裕暉; 松本恵李那; 吉田憲司; 殿山泰弘; 廣瀬まゆみ; 秋山いわき; 渡辺好章
日本音響学会2016年春季研究発表会, 2016 - 造影剤投与下における超音波照射が生体熱的作用に与える影響について
赤井 一揮; 高橋 敦; 新田 尚隆; 石黒 保直; 谷口 信行; 秋山 いわき
超音波医学, Apr. 2015, Apr. 2015, Apr. 2015, (公社)日本超音波医学会 - 音響放射力を伴う超音波照射による骨表面上の温度上昇について
秋山 いわき
日本音響学会2016年春季研究発表会, 2015 - ビーム交差コントラストエコー法を用いた速度ベクトルの超音波測定
秋山 いわき
日本超音波医学会第88会学術集会, 2015 - 超音波加温による生体組織の体積熱容量の測定法
秋山 いわき
日本超音波医学会第88会学術集会, 2015 - 超音波パルスエコー方式による生体内部の温度上昇分布のイメージング
秋山 いわき
日本超音波医学会第88会学術集会, 2015 - 造影剤投与下にける超音波照射が生体熱的作用に与える影響について
秋山 いわき
日本超音波医学会第88会学術集会, 2015 - 超音波ビーム交差コントラストエコー法による非線形イメージング
秋山 いわき
日本音響学会2015年秋季研究発表会, 2015 - Shear Wave Elastography のための粘性球体内包物を含むファントムの作成
秋山 いわき
日本超音波医学会 第42回関西地方会学術集会, 2015 - MRIの画像情報を用いた生体組織の音速推定について －T1・T2値と音速の関係－
秋山 いわき
日本超音波医学会 第42回関西地方会学術集会, 2015 - ファイバブラッググレーティング(FBG)センサを用いた超音波音圧と温度の同時計測
秋山 いわき
第56回光波センシング技術研究会講演会, 2015 - Simultaneous measurement of sound pressure and temperature of tissue mimicking material by an optical fiber Brag grating sensor,
AKIYAMA Iwaki
Acoustical Society of America, 2015 - On the thermal effect in biological tissues exposed to ultrasound of longer pulse duration after administration of contrast agents
AKIYAMA Iwaki
IEEE International Ultrasonics Symposium, 2015 - 最近の超音波イメージング新技術とその展望,
秋山 いわき
日本超音波医学会 第42回関西地方会学術集会, 2015 - Safety of Medical Ultrasound
AKIYAMA Iwaki
Asian Symposium on Advanced Ultrasound Technology, 2015 - 超音波による生体組織の単位体積あたりの熱容量の測定 －ファントム実験－
秋山 いわき
電子情報通信学会 超音波研究会, 2014 - Measurement of temperture rise of tissue heating by ultrasonic pulse-echo method
AKIYAMA Iwaki
The 11th Congress of Asian Federation of Societies for Ultrasound in Medicine and Biology, 2014 - マイクロバブルを用いた血流速度ベクトルの超音波計測
秋山 いわき
第35回超音波エレクトロニクスの基礎と応用に関するシンポジウム, 2014 - 生体組織の局所加熱による温度上昇分布の超音波計測
秋山 いわき
第35回超音波エレクトロニクスの基礎と応用に関するシンポジウム, 2014 - 超音波照射によるFBGセンサーと熱電対の温度上昇測定の比較
秋山 いわき
第35回超音波エレクトロニクスの基礎と応用に関するシンポジウム, 2014 - 超音波Bモード像における音速分布の補正
秋山 いわき
日本超音波医学会第88回学術集会, 2014 - 超音波による生体組織の熱的特性の測定法の提案
秋山 いわき
日本超音波医学会第41回関西地方会学術集会, 2014 - 超音波による生体組織の温度上昇測定
秋山 いわき
日本超音波医学会第41回関西地方会学術集会, 2014 - 音速分布を考慮した超音波イメージング －MRIによる音速推定の試み－
秋山 いわき
日本超音波医学会第87回学術集会, 2014 - 光ファイバセンサを用いた超音波・温度の同時多点計測
秋山 いわき
日本音響学会2014年春季研究発表会, 2014 - 超音波による生体組織の温度上昇の測定について
秋山 いわき
日本音響学会2014年春季研究発表会, 2014 - マイクロバブルを用いた超音波ドプラ血流計測法の検討,
秋山 いわき
日本音響学会2014年春季研究発表会, 2014 - Biological effects of tissue exposed to ultrasound with acoustic radiation force
秋山 いわき
The 11th Congress of the Asian Federation of Societies for Ultrasound in Medicine and Biology, 2014 - 超音波診断装置の安全性を理解する
秋山 いわき
日本超音波医学会関西地方会第４１回関西地方会, 2014 - In vivo measurement of temperature rise living ravvit's liver exposed to ultrasound with acoustic radiation force
Notaka Nitta; Yasunao Ishiguro; Hideki Sasanuma; Nobuyuki Taniguchi; Iswaidssss
Proceedings of IEEE International Ultrasonics Symposium, 2014 - Multipoint measurement of sound pressure and temperature in biological tissues by using optical fiber sensors
AKIYAMA Iwaki
166th Meeting of the Acoustical Society of America, 2013 - 光ファイバセンサを用いた超音波と温度変化の分離測定
秋山 いわき
電子情報通信学会超音波研究会, 2013 - マイクロバブルの非線形振動を用いた血流速度計測法の検討
秋山 いわき
第３回アコースティックイメージング研究会, 2013 - 周波数依存減衰を補正したパルス圧縮広帯域画像化の検討
秋山 いわき
日本超音波医学会第85回学術集会, 2012 - 超音波照射と温度上昇との関係
秋山 いわき
日本超音波医学会第85回学術集会, 2012 - Multi-Frequency Ultrasonic Imaging using Multiple Resonance Piezoelectric Transducer
秋山 いわき
International Conference on Sensing, Imaging and Signal Processing, 2012 - Temperature Rise by Exposure of Ultrasound with Acoustic Radiation Force
秋山 いわき
Joint Congress of Medical Ultrasound in Seoul, 2012 - Wide Band Pulse Compression Imaging with Transmission Compensation for Frequency Dependent Attenuation
Kouhei Koumoto; Kouhei Nii; Norio Tagawa; Kan Okubo; Iwaki Akiyama
Proceedings of the IEEE Ultrasonics Symposium, 2012 - Temperature Elevation of Biological Tissue Model Exposed by Focused Ultrasound with Acoustic Radiation Force
Naotaka Nitta; Nobuki Kudo; Iwaki Akiyama
Proceedings of 19th International Symposium on Nonlinear Acoustics, 2012 - ent of multiple frequency ultrasonic imaging system by using multi-resonance piezoelectric transducer
AKIYAMA Iwaki
第32回超音波エレクトロニクスの基礎と応用に関するシンポジウム講演論文集, 2011 - アコースティックイメージングの最近の動向
秋山 いわき
アコースティックイメージングの最近の動向, 2011 - アコースティックイメージングの最近の動向
秋山 いわき
日本音響学会春季研究発表会, 2011 - WFUMB Safety Committeeにおける安全性への取り組み
秋山 いわき
日本超音波医学会第84回学術集会, 2011 - Basic Concepts of Safety of Ultrasound Diagnostic Equipment
秋山 いわき
AFSUMB Workshop 2011, 2011 - 超音波診断装置の基礎から最近の新しい技術まで
秋山 いわき
日本超音波医学会関東甲信越地方会第23回学術集会, 2011 - 多共振型圧電振動子を用いた多周波超音波イメージングによる画質改善
秋山 いわき
日本超音波医学会第84回学術集会, 2011 - Numerical Evauation of a Composite-based Multiple-Resonance Transducer
Kentaro Nakamura; Yuji Wada; Daisuke Koyama; Shigemi Saito; Iwaki Akiyama
Proceedings of IEEE Ultrasonics Symposium, 2011 - 1Pa-60 Study on Influence of Frequency Dependent Attenuation for Wideband Pulse Compression Imaging(Poster Session)
Koumoto Kouhei; Tanabe Masayuki; Okubo Kan; Tagawa Norio; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, 06 Dec. 2010, 06 Dec. 2010, 06 Dec. 2010, Steering committee of symposium on ultrasonic electronics - Effects of ultrasonic multiple scattering by microbubbles on Doppler frequency spectrum
AKIYAMA Iwaki
Proceedings of Symposium on Ultrasonic Electronics, 2010 - Study on Influence of Frequency Dependent Attenuation for Wideband Pulse Compression
AKIYAMA Iwaki
Proceedings of Symposium on Ultrasonic Electronics,, 2010 - 厚い共振板を接着した多共振型圧電振動子による多周波イメージング
秋山 いわき
日本音響学会秋季研究発表会, 2010 - Speckle reduction by multiple- frequency ultrasonic imaging
秋山 いわき
9th Congress of Asian Federation of Societies for Ultrasound in Medicine and Biology, 2010 - 骨内画像化への応用を目指した広帯域超音波探触子に関する検討
秋山 いわき
日本超音波医学会第83回学術集会, 2010 - 多共振型振動子による超音波イメージング
秋山 いわき
日本超音波医学会第83回学術集会, 2010 - ハンドヘルドカメラのオンラインキャリブレーションによる瓦礫下生存者検知用棒状レーダーセンサーの位地姿勢推定
秋山 いわき
第16回画像センシングシンポジウム, 2010 - 多共振型圧電振動子
秋山 いわき
2010年春季第57回 応用物理学関係連合講演会, 2010 - 厚い共振板を接着した多共振型圧電振動子の音響特性
秋山 いわき
日本音響学会 2010年春季研究発表会, 2010 - 超音波ドプラ法を併用する Counter-Crossed Beam Contrast Echo法の検討
秋山 いわき
日本音響学会 2010年春季研究発表会, 2010 - 厚い共振板を接着した多共振型圧電振動子による多周波イメージング
秋山 いわき
日本音響学会秋季研究発表会, 2010 - 厚い共振板を接着した多共振型圧電振動子の音響特性
秋山 いわき
日本音響学会 2010年春季研究発表会, 2010 - 超音波ドプラ法を併用する Counter-Crossed Beam Contrast Echo法の検討
秋山 いわき
日本音響学会 2010年春季研究発表会, 2010 - 多共振型圧電振動子による超音波診断装置の開発
秋山 いわき
電子情報通信学会超音波研究会, 2010 - Multiple Frequencies Ultrasonic Imaging Using Multiple-Resonance Transducer
Iwaki Akiyama; Shigemi Saito; Kentaro Nakamura
Proceedings of IEEE Ultrasonics Symposium, 2010 - Numerical Evauation of a Composite-based Multiple-Resonance Transducer
秋山 いわき
Proceedings of IEEE Ultrasonics Symposium, 2010 - 3P5-13 Blood flow measurement by Counter-Crossed Beam Contrast Echo method : Prototype system using ultrasound diagnostic equipment(Poster Session)
Eura Taishi; Yoshida Kenji; Watanabe Yoshiaki; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, 18 Nov. 2009, 18 Nov. 2009, 18 Nov. 2009, Steering committee of symposium on ultrasonic electronics - 2P5-11 Multi-resonance transducer for ultrasonic imaging(Poster Session)
Yoshizumi Natsuki; Nakamura Kentaro; Saito Shigemi; Ohira Katsumi; Takahashi Osamu; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, 18 Nov. 2009, 18 Nov. 2009, 18 Nov. 2009, Steering committee of symposium on ultrasonic electronics - Ultrasonic Imaging Using Multiple Resonance Transducer
YOSHIZUMI Natsuki; NAKAMURA Kentaro; AKIYAMA Iwaki
IEICE technical report, 19 Jun. 2009, 19 Jun. 2009, 19 Jun. 2009, The Institute of Electronics, Information and Communication Engineers - Fundamental study on Counter-Crossed Beam Contrast Echo method : Measurement of flow velocity by sum frequency component
EURA Taishi; YOSHIDA Kenji; WATANABE Yoshiaki; AKIYAMA Iwaki
IEICE technical report, 22 Jan. 2009, 22 Jan. 2009, 22 Jan. 2009, The Institute of Electronics, Information and Communication Engineers - 心拍振動を静止車両の振動から抽出する新たな信号処理方法の開発
秋山 いわき
第10回 計測自動制御学会 システムインテグレーション部門講演会，2009年12月25日, 2009 - 二周波数超音波ビームの交差による低周波差音を利用した非線形分布計測
秋山 いわき
日本音響学会春季研究発表会, 2009 - Counter-Crossed Beam Contrast Echo法による超低速血流の映像化
秋山 いわき
日本音響学会春季研究発表会, 2009 - 多周波超音波イメージング
秋山 いわき
日本超音波医学会第82回学術集会, 2009 - Broadband characteristics of piezoelectric transducer bonded to a thick plate resonator
秋山 いわき
The Acoustical Society of America, 2009 - 心拍振動を静止車両の振動から抽出する新たな信号処理方法の開発
秋山 いわき
第10回 計測自動制御学会 システムインテグレーション部門講演会, 2009 - 二周波数超音波ビームの交差による低周波差音を利用した非線形分布計測
秋山 いわき
日本音響学会春季研究発表会, 2009 - Counter-Crossed Beam Contrast Echo法による超低速血流の映像化
秋山 いわき
日本音響学会春季研究発表会, 2009 - Multiple Frequencies Ultrasonic Imaging Using Multiple-Resonance Transducer
秋山 いわき
Proceedings of IEEE Ultrasonics Symposium, 2009 - 2P7b-3 Bi-frequency driven transducers for multi-frequency ultrasonic imaging(Poster Session)
Yoshizumi Natsuki; Saito Shigemi; Koyama Daisuke; Nakamura Kentaro; Akiyama Iwaki
Proceedings of Symposium on Ultrasonic Electronics, 11 Nov. 2008, 11 Nov. 2008, 11 Nov. 2008, Steering committee of symposium on ultrasonic electronics - 多周波超音波イメージング
秋山 いわき
日本超音波医学会第81回学術集会, 2008 - Measurement of Secondary Waves Generated by Nonlinear Vibration of Microbubbles in the Crossed Beams of Two Ultrasonic Frequencies
I.Akiyama; N.Yoshimoto; K.Yoshida; Y.Watanabe
Proceedings of 18th International Symposium on Nonlinear Acoustics, 2008 - Rescue Radar System with Array Antennas
T. Takeuchi; H. Saito; Y. Aoki; A. Ohya; F. Matsuno; I. Akiyama
Proceedings of The 34th Annual Conference of the IEEE Industrial Electronics Society, 2008 - Measurement of Survivor Location by using GPR with Two Dimensional Array Antenna
T. Takeuchi; H. Saito; Y. Aoki; A. Ohya; F. Matsuno; I. Akiyama
Proceedings of SICE Annual Conference, 2008 - Measurement of Survivor Location for Rescue Radar System by using Two Dimensional Array Antenna
T. Takeuchi; Y. Uematsu; H. Saito; Y. Aoki; A. Ohya; F. Matsuno; I. Akiyama
Proceedings of the IEEE International Workshop on Safety, Security and Rescue Robotics, 2008 - Search for Survivors Buried in Rubble by Rescue Radar with Array Antennas - Extraction of Respiratory Fluctuation -
Iwaki Akiyama; Natsuki Yoshizumi; Akihisa Ohya; Yoshimitsu Aoki; Fumitoshi Matsuno
Proceedings of the IEEE International Workshop on Safety, Security and Rescue Robotics, 2007 - 超音波診断装置の広帯域化とスペックルについて 新しい非線形パラメータ推定法 装置広帯域化に伴う新しい展開
藤井 康友; 谷口 信行; 秋山 いわき; 伊東 紘一
超音波医学, Apr. 2006, Apr. 2006, Apr. 2006, (公社)日本超音波医学会 - 超音波照射による生体組織の温度上昇のFBGによる測定と体積熱容量の推定
真鍋稔生
Oral presentation - MRIで撮像された画像情報を用いる超音波イメージング －高磁場対応超音波プローブの試作－
森泉裕貴; 新井慎平; 二矢川和也; 秋山いわき
日本超音波医学会第43回関西地方会学術集会
Industrial Property Rights
- Patent right
超音波診断装置、超音波診断方法、及びプログラム
秋山 いわき, 北村公汰, 斎藤こずえ, 猪原匡史, 福嶌教偉, 長束一行, 瀬口理, 巽英介
特願2019-093103 - Patent right
超音波診断装置
秋山 いわき, 辻本祐加子, 田中利洋, 平井都始子, 南口貴世介
特願2018-201077 - Patent right
超音波診断装置
秋山 いわき
特願2018-201075 - Patent right
超音波診断装置及びその画像形成方法
秋山 いわき
特願2015-140910, 特願2015-140910
Research Projects
- The effect of ultrasound with acoustic radiation force impulse on lung tissue in large animals
高山 法也; 谷口 信行; 小形 幸代; 新田 尚隆; 秋山 いわき; 力山 敏樹; 笹沼 英紀
音響放射力インパルス(ARFI)は組織の硬度を測定する超音波検査(ARFIエラストグラフィー)として近年臨床使用されているが、我々はこれまでに動物実験においてARFIの照射により意図しない肺損傷が起こる可能性を報告してきた。ARFIエラストグラフィーの安全性を検討するため、今回、臨床使用に近い条件でARFIの肺への照射実験を行った(本実験は文部科学省における「研究機関等における動物実験等の実施に関する基本指針」に従い、自治医科大学動物実験委員会の承認(承認番号17233-01)を得たものである)。方法としてはカスタムメイドしたARFI装置(Bモード表示部とARFI送信部をスイッチで切り替え可)を使用し、リニアプローベ(5.2MHz)をウサギの左右の上腹部肋弓下の体表に設置し、Bモードで肺表面を描出、照射部位を決定、一時的に呼吸を停止させた上で同部位に照射を行った。照射の条件はPulse duration (PD): 0.3ms, focus: 30mm、照射回数: 30回、照射間隔: 3sとし、Mechanical Index (MI)を6段階に設定(①0.37 ②0.49 ③0.58 ④0.75 ⑤0.84 ⑥0.88)した。各々のグループのサンプル数は6とした。結果は肉眼所見としては照射した部位に一致して肺表面にred spot(病理組織所見では照射部位の胸膜直下の肺胞出血)を認め、得られたデータからはMI値と肺損傷(red spotの発生率及びその面積)の間には正の相関を認めた。本実験は動物実験であり、同部位へのARFI照射回数が30回と多いものの、FDAの認証基準であるMechanical Index ＜ 1.9 において肺損傷(肺胞出血)が確認されており、今後さらなる検証が必要と考えられた。, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2019/04 -2023/03, Grant-in-Aid for Scientific Research (C), Jichi Medical University - Middle level output exposed to ultrasound effected by biological generation and growth
AKIYAMA Iwaki
Japan Society of Promotion of Science, Basic Research (B), 2019/04 -2022/03, Principal investigator, Competitive research funding - Quantitative diagnosis of non-alcoholic steatohepatitis by ultrasound and elucidation of the mechanism of occurrence by ultratrace mass spectrometry
WATANABE Yoshiaki
A new system to elucidate the pathogenic basis of non-alcoholic hepatitis from the metabolic aspect in detail using a medaka model is developed. Specifically, the main bile acid of medaka, which is rare for fish, is C24 (TCA) and C27 (THCA), and succeeded in visualizing the distribution of these two bile acids within one medaka individual. In addition, the main component analysis revealed the site and metabolism of each digestive organ. Regarding the relationship It was suggested that these two bile acids are functioning. Using this research method, it will be possible to comprehensively analyze the enterohepatic circulation of bile including bile acids, which will lead to the elucidation of the molecular basis from fatty liver to carcinogenesis in the model of one individual medaka., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2018/04 -2021/03, Grant-in-Aid for Scientific Research (C), Doshisha University - Biosafety for the ultrasonic wave ---Genetic analysis stepped over the generation ---
Watanabe Yoshiaki; AKIYAMA Iwaki; MATSUMOTO Erina; SAKAGUTI Hiroki; YAMASHITA Yusuke; ISHIHARA Kazyya; HIROSE Mayumi
Quantitative references for the ultrasonic diagnosis were discussed from the viewpoint of biosafety. Experiments were carried out throughout the ultrasonic wave irradiation on living body with paying the attentions to "changes between a gene expression and a protein expression ". As a kind target for the observation, Medaka(Japanese killifish ) was applied because of the short generation of three months, then the genetic effects were also observed. As a result of performing the ultrasonic wave irradiation to a Medaka embryo, and having performed proteome analysis, AHCY enzyme was identified as a change protein. In addition, as for this enzyme, it was observed the increase of the quantity of outbreak with a rise of ultrasonic sound pressure. Furthermore, we succeeded in the visualization of the various kinds of small molecule metabolism thing as a result that the imaging mass spectrometry using MALDI reached and was able to clarify local existence of two kinds of Medaka bile acid., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2016/04 -2018/03, Grant-in-Aid for Challenging Exploratory Research, Doshisha University - 造影剤投与後の心臓に対する音響放射力インパルスの安全性評価
秋山 いわき
基盤研究（Ｂ）（一般）, 2016 -2018, Principal investigator, Competitive research funding - 超音波を基軸とした新たな医療技術開発の拠点形成ーヒトにやさしい医療を目指してー
秋山 いわき
文部科学省, 私立大学戦略的研究基盤形成支援事業, 文部科学省各種事業, 2013/10 -2017/03, Principal investigator, Competitive research funding - A Study for High-Quality and High-Functional Medical Ultrasound Images
TAGAWA NORIO; YAGI SHIN-ICHI; AKIYAMA IWAKI
In this study, we aim to perform high-definition imaging, high-functional imaging and high-resolution imaging. We proposed some new methods for speckle suppression and FDA compensation of harmonic imaging as high-definition imaging, elastography specially used for tumor in consideration of living body safety as high-functional imaging and super resolution synthetic aperture method based on the phase information of carrier waves. The effectiveness of these methods was confirmed through FEM simulations and experiments., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2013/04 -2016/03, Grant-in-Aid for Scientific Research (C), Tokyo Metropolitan University - Three dimensional blood flow vector measurement by using ultrasonic crossed beam contrast echo method
WATANABE Yoshiaki; AKIYAMA Iwaki
Since the Doppler frequency of summed and different frequency observed by the ultrasonic crossed beams contrast echo method is calculated as a function of two angle components for the beams to the flow direction, a blood flow vector is estimated by solving the simultaneous equations of second harmonic and summed components without beam angle. This study discusses the feasibility of the proposed method by using experimental system incudes flow phantom. This experimental system is constructed as follows. The silicone tube of 4mm of inner diameter is located in the degassed water tank. The two ultrasonic beams of frequency of 3.2MHz and 2.0 MHz are crossed at the tube. Microbubbles (Sonazoid) are flowed in the tube with degassed water. Flow velocities are set as 10 mm/s, 20 mm/s and 30 mm/s. The summed frequency is 5.2MHz and second harmonic is 6.4 MHz. As a result, the flow velocities are estimated within the error ratio of 10%., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2012/04 -2015/03, Grant-in-Aid for Scientific Research (C), Doshisha University - 音響放射力を伴う超音波の生体への影響
秋山 いわき
基盤研究（Ｂ）（一般）, 2011 -2013, Principal investigator, Competitive research funding - Multiple frequencies ultrasonic imaging for alleviation of exposure risk
AKIYAMA Iwaki; WATANABE Yoshiaki; NAKAMURA Kentaro; TANIGUCHI Nobuyuki
This study developed two types of multiple frequencies ultrasonic imaging for alleviation of ultrasound exposure risk of biological tissues. One is "crossed two-frequency beams contrast echo method", which measures distribution of low speed blood flow at the crossed area of two beams with different frequencies. The other is "multiple-frequency echo method", which forms multiple-frequency images using the broadband pulsed wave of multiple peak frequencies., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2008 -2010, Grant-in-Aid for Scientific Research (B), Shonan Institute of Technology - STUDY ON THE IMPROVEMENT OF IMAGE DEGRADATION FOR ULTRASONIC ECHOGRAPHIC IMAGE BY USING HIGHER ORDER HARMONICS
AKIYAMA Iwaki; OHYA Akihisa
This study concentrates on the improvement of image degradation of ultrasonic echographic images by using higher order harmonics which are generated while ultrasound waves propagate through the biological tissues., Since image degradation caused by speckle patterns in the echographic image has been a problem, it is an important task to reduce these patterns to obtain higher quality images. In order to detect the higher harmonic components contained in the echo signals efficiently, a specialized transducer for broadband reception, besides the transmitting transducer is necessary. By constructing a mechanical sector scanner of an ultrasonic diagnosis system using such a PZT-PVDF two-layered ultrasonic probe, an ultra-broadband ultrasonic imaging system capable of a real time imaging was prototyped. Thus, the real time imaging was carried out by obtaining the echo signal from phantoms using a PZT-PVDF two-layered ultrasonic mechanical sector probe, and the effectiveness of its higher harmonic components from the fundamental to the fourth harmonic was confirmed in speckle reduction. Then we prototyped the novel transducer which transmits ultrasonic pulse of dual-frequency and receives multi-frequency echoes from the biological tissues. When the ultrasonic pulse off and 4f_0 are transmitted into the biological tissues, 2f_0, 3f_0, and 5f_0 components are generated as the secondary waves. We have prototyped the PZT disk of 7 mm in diameter coaxially arranged in the PZT ring of 17 mm in outer diameter The ring and circular transducers transmit the pulses of 2 and 8 MHz, respectively. It was confirmed that this transducer formed the ultrasonic beams of 4, 6 and 10 MHz as well as the beams of 2 and 8 MHz in degassed water. Then the experiments of imaging the agar-gel phantom and pork meat were carried out by mechanical scanning. As a result, we also confirmed the improvement of image degradation by reducing the speckle noise., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2005 -2007, Grant-in-Aid for Scientific Research (C), Shonan Institute of Technology - Ultrasonic Real-time Imaging Using Acoustic Fourier Transform
NAKAJIMA Masato; AKIYAMA Iwaki; SAITO Hideo
The purpose of this research is 1. Development of the new method that performs Fourier Transform of the object by the ultrasound (Acoustic Fourier Transform) and reconstructs the object by Inverse Fast Fourier Transform in the computer. 2. Experiment of reconstructionabout the glass, the stainless steel, which are transparent by the optical method, and the object in the flame, the mud, the mist, which is called the ultimated environment, for the verification of this method. We made the reflection type Acoustic Fourier Transform system. An object and a reference source are arranged in the front of the transmitter-receiver array which arranged many receivers in the circumference of one transmitter. Here, these elements are arranged sot that they may be on the same perimeter. Then, Fourier Transform of the object can be obtained at the receiver array by interference of the reference wave and the reflection wave from the object (the object wave). Moreover, in this method, it was decided with the system that the reference signal made in the computer was electrically added on the circuit for the substitute of arranging a reference source in the neighborhood of the object. And, automatical focusing, which measured a distance to the object by the pulse echo method, was included to adjust the delay quantity of the reference signal made in the computer. Using this system, we reconstructed the object (geometrical easy figures, alphabet characters) made of the acrylic fiber as an example of the optical transparent object, and the object in the smoke as an example of the object under the ultimated environment. As a result, each object was reconstructed sufficiently, and the validity of this method was confirmed. We could perform all of the processing in about 20 seconds using the personal computer which had the CPU of Pentium 133MHz., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 1995 -1996, Grant-in-Aid for Scientific Research (C), Keio University - Automated Measurement of Organ Volume Using Ultrasonic Bubble Filling Method
NAKAJIMA Masato; ITOH Takashi; NATORI Michiya; OYA Akihisa; AKIYAMA Iwaki
The purpose of this study is to measure the volume of the target organ accurately and automatically from ultrasound images. In order to measure the volume accurately, it is necessary to determine the boundary of the target organ beforehand. It is, however, difficult to detect the organ boundary satisfactorily, because the ultrasound image quality is seriously deteriorative. Therefore, we developed the method for measuring the volume of the target organ accurately and automatically using the newly proposed Bubble Filling Method. As a result of applying this method to agar gel phantom data, it was possible to measure the volume accurately and automatically. In this research period, we measured 50 fetal bladder volumes to verify the method's effectiveness. Data acquision was as follows : the angle (parallel) and the speed of the probe applied to the mothers' abdomen were fixed during the scanning. Then we applied this method to the data and measured the volume. As a result, it was possible to measure the volume accuraterly and automatically. Finally, we proposed the method for measuring the volume of urinary bladders accurately and easily from ultrasound images. A set of two-dimensional cross-section images and a vertical-section image are acquired by parallel scanning and then the urine bladder volume is measured accurately without special hardware. As a result of applying this method to experimental data and clinical data, it was possible to measure the volume of the urinary bladder. In addition, we constructed computer-set that is able to handle and save enormous clinical data., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 1995 -1996, Grant-in-Aid for Scientific Research (B), Keio University - 超音波断層映像法とホログラフィックステレオグラムの技術を用いた胎児の3次元映像化
秋山 いわき
日本学術振興会, 科学研究費助成事業, 1989 -1989, 奨励研究(A), 相模工業大学
Teaching Experience
- Advanced Lecture of Medical Imaging System
International Science and Technology Course, Doshisha University - Advanced Lecture of Ultrasonic Electronics
International Science and Technology Course, Doshisha University - 超音波医科学深論
同志社大学大学院 - 医用画像システム特論
同志社大学大学院 - 超音波医科学特論
同志社大学大学院 - 電子計測
同志社大学 - エレクトロニクス
同志社大学
Research Seeds
- Measurement of temperature dependence of sound velocity for biological tissuesResearch Fields: Life Sciences, Medical and Pharmaceutical Sciences, Machinery and Measuring Equipment
- US and MR Multimodality Imaging of The HeartResearch Fields: Medical and Pharmaceutical Sciences, Machinery and Measuring Equipment
- Image Quoality Improvement of Echography by using Image Information of MRIResearch Fields: Medical and Pharmaceutical Sciences, Life Sciences, Sports , Healthcare and WelfareAffiliation/Name: Iwaki Akiyama
- Measurement of volumetric Heat Capacity of Biological Tissues by UltrasoundResearch Fields: Medical and Pharmaceutical Sciences, Life Sciences, Sports , Healthcare and WelfareAffiliation/Name: Iwaki Akiyama