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Next-Generation Ultrasonic Beamformer with Innovative Transducer and Deep Learning

Research Project

Project/Area Number 19K22891
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 62:Applied informatics and related fields
Research InstitutionUniversity of Toyama

Principal Investigator

Hasegawa Hideyuki  富山大学, 学術研究部工学系, 教授 (00344698)

Co-Investigator(Kenkyū-buntansha) 藤原 久美子  富山大学, 学術研究部医学系, 助教 (60404737)
長岡 亮  富山大学, 学術研究部工学系, 准教授 (60781648)
高 尚策  富山大学, 学術研究部工学系, 准教授 (60734572)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords超音波 / ビームフォーミング / 深層学習 / 超音波イメージング
Outline of Research at the Start

医用超音波画像の構築において,超音波ビームフォーマが重要な役割を果たす.本研究では,深層学習を用いた新しい手法を開発する.深層学習はデータが多いほど性能が向上することが期待されるため,超音波エコー信号の基本波だけでなく高調波も効率的に計測できる超音波振動子・送受信方法も検討する.人工ニューラルネットワークの学習は,生体組織の音響特性をもとに,生体からの超音波エコー信号を生成するシミュレーション環境を構築し,十分な数の学習用データを生成する.計算機シミュレーションにより学習させた人工ニューラルネットワークを,配列型振動子を用いて計測された超音波データに適用し,高精度な超音波断層像の構築を図る.

Outline of Final Research Achievements

A beamformer is a indispensable component in medical ultrasound imaging. This study explored beamforming methods through deep learning for accurate reconstruction of target structures. In the present study, a simulation platform was first developed for generation of numerous data mimicking ultrasonic echoes from biological tissues because a lot of data are required to train the artificial neural network appropriately. Generating data in simulation has another merit, i.e., the true property of the source of the simulated echo signals is known and can be used as a teacher data for training of the artificial neural network. Using the neural network trained by such simulated data sets, ultrasonic images were obtained with less influences of the characteristics of the ultrasonic imaging system. The artificial neural network was also trained by the data sets produced with a more sophisticated beamformer, and the trained neural network produced more accurate ultrasonic images.

Academic Significance and Societal Importance of the Research Achievements

医用超音波画像の品質はビームフォーマに大きく依存するため,ビームフォーマの高性能化に関する研究開発が精力的に行われている.一方,そのような高度なビームフォーマは計算負荷が高く,医用超音波画像の特徴の1つであるリアルタイム性を損なわずに実装できない場合が多い.本研究は,深層学習を用いて高度なビームフォーマと同様の画像を出力する手法について検討を行い,超音波伝搬シミュレーションにより人工ニューラルネットワークを学習させるための多数のデータを生成することで深層学習を用いてより高精度な画像が得られることを示した.本研究成果は,医用超音波画像の品質向上に資するものである.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (121 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (28 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 28 results,  Open Access: 2 results) Presentation (88 results) (of which Int'l Joint Research: 25 results,  Invited: 7 results) Book (1 results) Remarks (3 results)

  • [Int'l Joint Research] Technical University of Denmark(デンマーク)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Improving image contrast and accuracy in velocity estimation by convolution filters for intracardiac blood flow imaging2022

    • Author(s)
      Mozumi Michiya、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Ultrasonics

      Volume: 120 Pages: 106650-106650

    • DOI

      10.1016/j.ultras.2021.106650

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study on estimation of surface roughness by separation of reflection and backscattering components using ultrasonic synthetic aperture imaging2021

    • Author(s)
      Nagata Kazunori、Nagaoka Ryo、Wilhjelm Jens E.、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SD Pages: SDDE09-SDDE09

    • DOI

      10.35848/1347-4065/abf2a4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Improvement of spatial resolution of medical ultrasound images by constrained least-square method2021

    • Author(s)
      Hasegawa Hideyuki、Mozumi Michiya、Omura Masaaki、Nagaoka Ryo
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SD Pages: SDDE16-SDDE16

    • DOI

      10.35848/1347-4065/abf3a1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects from correction of speed of sound in transmit and receive beamforming using focus beam2021

    • Author(s)
      Nagaoka Ryo、Yoshizawa Shin、Umemura Shin-ichiro、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SD Pages: SDDE19-SDDE19

    • DOI

      10.35848/1347-4065/abf55b

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preliminary investigation on clutter filtering based on deep learning2021

    • Author(s)
      Wang Hongpeng、Gao Shangce、Mozumi Michiya、Omura Masaaki、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SD Pages: SDDE21-SDDE21

    • DOI

      10.35848/1347-4065/abf39d

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A study on understanding the physical mechanism of change in ultrasonic envelope statistical property during temperature elevation2021

    • Author(s)
      Omura Masaaki、Takeuchi Michio、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Medical Physics

      Volume: 48 Issue: 6 Pages: 3042-3054

    • DOI

      10.1002/mp.14890

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement of flow velocity vectors in carotid artery using plane wave imaging with repeated transmit sequence2021

    • Author(s)
      Hasegawa Hideyuki、Mozumi Michiya、Omura Masaaki、Nagaoka Ryo、Saito Kozue
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 48 Issue: 4 Pages: 417-427

    • DOI

      10.1007/s10396-021-01113-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Statistical Analysis of Ultrasonic Scattered Echoes Enables the Non-invasive Measurement of Temperature Elevations inside Tumor Tissue during Oncological Hyperthermia2021

    • Author(s)
      Takeuchi Michio、Sakai Toshihiko、Andocs Gabor、Takanaka Tsuyoshi、Taka Masashi、Yamashita Kuniko、Kawahara Masahiro、Nojiri Tomoko、Tanaka Asaka、Norishima Azusa、Omoto Yoshitaka、Omura Masaaki、Nagaoka Ryo、Takao Keizo、Hasegawa Hideyuki
    • Journal Title

      Ultrasound in Medicine & Biology

      Volume: 47 Issue: 11 Pages: 3301-3309

    • DOI

      10.1016/j.ultrasmedbio.2021.07.019

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Advances in ultrasonography: image formation and quality assessment2021

    • Author(s)
      Hasegawa Hideyuki
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 48 Issue: 4 Pages: 377-389

    • DOI

      10.1007/s10396-021-01140-z

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preliminary study on the separation of specular reflection and backscattering components using synthetic aperture beamforming2020

    • Author(s)
      Nagaoka Ryo、Wilhjelm Jens E.、Hasegawa Hideyuki
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 47 Issue: 4 Pages: 493-500

    • DOI

      10.1007/s10396-020-01038-2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Temperature elevation in tissue detected in vivo based on statistical analysis of ultrasonic scattered echoes2020

    • Author(s)
      Takeuchi Michio、Sakai Toshihiko、Andocs Gabor、Takao Keizo、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 9030-9030

    • DOI

      10.1038/s41598-020-65562-4

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anti-aliasing method for ultrasonic 2D phase-sensitive motion estimator2020

    • Author(s)
      Mozumi Michiya、Nagaoka Ryo、Cinthio Magnus、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKE20-SKKE20

    • DOI

      10.35848/1347-4065/ab8c9a

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Estimation of speed of sound using coherence factor and signal-to-noise ratio for improvement of performance of ultrasonic beamformer2020

    • Author(s)
      Sannou Fumitada、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKE14-SKKE14

    • DOI

      10.35848/1347-4065/ab7fe7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Basic study on estimation method of wall shear stress in common carotid artery using blood flow imaging2020

    • Author(s)
      Nagaoka Ryo、Ishikawa Kazuma、Mozumi Michiya、Cinthio Magnus、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKE16-SKKE16

    • DOI

      10.35848/1347-4065/ab87f2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Improvement of performance of minimum variance beamformer by introducing cross covariance estimate2020

    • Author(s)
      Hasegawa Hideyuki、Nagaoka Ryo
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 47 Issue: 2 Pages: 203-210

    • DOI

      10.1007/s10396-020-01009-7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Modified high-resolution wavenumber analysis for detection of pulse wave velocity using coefficient of variation of arterial wall acceleration waveforms.2020

    • Author(s)
      Ryo Nagaoka, Hideyuki Hasegawa
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: - Issue: 2 Pages: 167-177

    • DOI

      10.1007/s10396-019-00998-4

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Temporal averaging introduced in linear regression beamforming for improvement of contrast-to-noise ratio2020

    • Author(s)
      Hasegawa Hideyuki、Nagaoka Ryo
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKE12-SKKE12

    • DOI

      10.35848/1347-4065/ab867e

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Speckle reduction of medical ultrasound images using deep learning with fully convolutional network2020

    • Author(s)
      Ando Kazuma、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKE06-SKKE06

    • DOI

      10.35848/1347-4065/ab80a5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Accuracy evaluation of 3D velocity estimation by multi-frequency phase-sensitive motion estimator under various specifications of matrix array probe2020

    • Author(s)
      Nunome Soichiro、Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SK Pages: SKKE01-SKKE01

    • DOI

      10.35848/1347-4065/ab78e7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Validation of differences in backscatter coefficients among four ultrasound scanners with different beamforming methods2020

    • Author(s)
      "Masaaki Omura, Hideyuki Hasegawa, Ryo Nagaoka, Kenji Yoshida, and Tadashi Yamaguchi"
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 47 Issue: 1 Pages: 35-46

    • DOI

      10.1007/s10396-019-00984-w

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Converting coherence to signal-to-noise ratio for enhancement of adaptive ultrasound imaging2020

    • Author(s)
      "Hideyuki Hasegawa and Ryo Nagaoka"
    • Journal Title

      Ultrasonic Imaging

      Volume: 42 Issue: 1 Pages: 27-40

    • DOI

      10.1177/0161734619889384

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Initial phantom study on estimation of speed of sound in medium using coherence among received echo signals2019

    • Author(s)
      "Hideyuki Hasegawa and Ryo Nagaoka"
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 46 Issue: 3 Pages: 297-307

    • DOI

      10.1007/s10396-019-00936-4

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Utilization of singular value decomposition in high-frame-rate cardiac blood flow imaging2019

    • Author(s)
      "Michiya Mozumi, Ryo Nagaoka and Hideyuki Hasegawa"
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SG Pages: SGGE02-SGGE02

    • DOI

      10.7567/1347-4065/ab1131

    • NAID

      210000156364

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Singular value decomposition filter for speckle reduction in adaptive ultrasound imaging2019

    • Author(s)
      "Hideyuki Hasegawa and Ryo Nagaoka"
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SG Pages: SGGE06-SGGE06

    • DOI

      10.7567/1347-4065/ab0ad6

    • NAID

      210000156346

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Investigation of initial value dependence in the statistical analysis of ultrasonic scattered echoes for the non-invasive estimation of temperature distribution in biological tissue2019

    • Author(s)
      "Michio Takeuchi, Yuta Matsui, Toshihiko Sakai, Gabor Andocs, Ryo Nagaoka, and Hideyuki" Hasegawa
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SG Pages: SGGE09-SGGE09

    • DOI

      10.7567/1347-4065/ab0ba8

    • NAID

      210000156383

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Investigation of the estimation accuracy of two-step block matching methods using envelope and RF signals for two-dimensional blood flow vector imaging2019

    • Author(s)
      "Ryo Nagaoka, Michiya Mozumi, and Hideyuki Hasegawa"
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SG Pages: SGGE10-SGGE10

    • DOI

      10.7567/1347-4065/ab0ffa

    • NAID

      210000156389

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Comparison of ultrasonic motion estimators for vascular applications2019

    • Author(s)
      "Akira Miyajo, Ryo Nagaoka, and Hideyuki Hasegawa"
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SG Pages: SGGE16-SGGE16

    • DOI

      10.7567/1347-4065/ab19b5

    • NAID

      210000156515

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identification of vascular lumen by singular value decomposition filtering on blood flow velocity distribution2019

    • Author(s)
      Nagaoka Ryo、Hasegawa Hideyuki
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: 46 Issue: 2 Pages: 187-194

    • DOI

      10.1007/s10396-019-00928-4

    • NAID

      130007967683

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 心臓血流速度計測のためのブロックマッチングにおける回転考慮2022

    • Author(s)
      小路重虎, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 乳児の哺乳運動評価のための超音波動態速度計測の精度評価シミュレーション2022

    • Author(s)
      丸 尊駿, 茂澄倫也, 大村眞朗, 長岡 亮, 斉藤 哲, 藤原久美子, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超音波開口合成法による表面粗さ評価の深さ依存性に関する検討2022

    • Author(s)
      山口 崇, 茂澄倫也, 大村眞朗, 長岡 亮, Jens E. Wilhjelm, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 深層学習による静脈内異常エコー検出のためのシミュレーションによる基礎検討2022

    • Author(s)
      森 友雅, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 血管壁の3次元変位計測のための少数素子プローブの検討2022

    • Author(s)
      高松佳汰, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 基礎実験による2次元位相追跡法における送信条件の影響の検討2022

    • Author(s)
      矢野達也, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 血液の後方散乱係数解析におけるクラッタフィルタの効果検証2022

    • Author(s)
      大村眞朗, 長岡 亮, 八木邦公, 吉田憲司, 山口 匡, 長谷川英之
    • Organizer
      日本音響学会2022年春季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 最尤推定法による超音波断層像の距離分解能向上に関する検討2021

    • Author(s)
      長谷川英之, 茂澄倫也, 大村眞朗, 長岡 亮
    • Organizer
      日本超音波医学会第94回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 平面波パケット送信におけるクラッタフィルタに関する検討2021

    • Author(s)
      長谷川英之, 茂澄倫也, 大村眞朗, 長岡 亮, 斎藤こずえ
    • Organizer
      日本超音波医学会第94回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 散乱特性解析による静脈血評価と微小血栓検出に向けた基礎検討2021

    • Author(s)
      大村眞朗, 長岡 亮, 茂澄倫也, 八木邦公, 吉田憲司, 山口 匡, 長谷川英之
    • Organizer
      日本超音波医学会第94回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超音波画像の受信ビーム間隔のブロックマッチング法の推定精度への影響に関する検討2021

    • Author(s)
      茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本超音波医学会第94回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 頸動脈の2次元変位計測におけるエレベーション方向の動きの影響に関する基礎検討2021

    • Author(s)
      長岡 亮, 茂澄倫也, 大村眞朗, 長谷川英之
    • Organizer
      日本超音波医学会第94回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超高速超音波イメージングによる頚動脈プラーク動態計測の試み2021

    • Author(s)
      斎藤こずえ, 茂澄倫也, 大村眞朗, 長岡 亮, 小林泰代, 杉江和馬, 平井都始子, 長谷川英之
    • Organizer
      日本超音波医学会第94回学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 心拍による頸動脈変位の2次元超音波計測における送信条件の影響の検討2021

    • Author(s)
      矢野達也, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2021年秋季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 送信波の伝搬遅延時間の考慮による超音波画像向上の検討2021

    • Author(s)
      杉岡虎太郎, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2021年秋季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Effect of material properties on Ultrasonic Envelope statistical property during temperature change2021

    • Author(s)
      Masaaki Omura, Michio Takeuchi, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      IEEE 2021 International Ultrasonics Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Enhancement of layered and fibrous structure by constrained least-square estimator2021

    • Author(s)
      Hideyuki Hasegawa, Michiya Mozumi, Masaaki Omura, and Ryo Nagaoka
    • Organizer
      IEEE 2021 International Ultrasonics Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparison of tracking methods of particle distribution in ultrafast ultrasound imaging2021

    • Author(s)
      Masaaki Omura, Ryo Nagaoka, Kunimasa Yagi, Kenji Yoshida, Tadashi Yamaguchi, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On the investigation of separation between reflection and backscattering components by plane wave imaging for estimation of surface roughness2021

    • Author(s)
      Kazuhiro Tochigi, Ryo Nagaoka, Jens E. Wilhjelm, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A basic study on ultrasound noninvasive measurement of temperature elevation inside biological tissue cauterized by radiofrequency catheter ablation2021

    • Author(s)
      Michio Takeuchi, Toshihiko Sakai, Yusuke Oshima, Yasuhiro Kojima, Kenji Mori, Masaaki Omura, Ryo Nagaoka, Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation on improvement of spatial resolution of ultrasound images by considering propagation delay time of transmitted wave2021

    • Author(s)
      Kotaro Sugioka, Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improvement of performance of minimum variance beamformer by Nakagami shape parameter2021

    • Author(s)
      Takumi Akamatsu, Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Basic study on separation of reflected components in pulse wave propagation using ultrafast ultrasound2021

    • Author(s)
      Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation on singular value decomposition filter for extraction of reflected signals from blood flow in veins2021

    • Author(s)
      Ryo Nagaoka, Masaaki Omura, Michiya Mozumi, Kunimasa Yagi, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation on estimation of velocity vectors for blood flow measurements2021

    • Author(s)
      Hideyuki Hasegawa, Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Kozue Saito
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation on effect of transmit condition on displacement estimation by phase-sensitive 2D motion estimators2021

    • Author(s)
      Tatsuya Yano, Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      The 42th Symposium on Ultrasonic Electronics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 心拍による頸動脈変位の2次元超音波計測におけるスライス方向変位の影響に関する検討2021

    • Author(s)
      長尾生成, 石川数馬, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2021年春季研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 集束超音波ビームを用いた開口合成法による血流測定法の検討2021

    • Author(s)
      杉岡虎太郎, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2021年春季研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 深層学習を用いた超音波ビームフォーマの検討2021

    • Author(s)
      比企隆一, 茂澄倫也, 大村眞朗, 長岡 亮, 長谷川英之
    • Organizer
      日本音響学会2021年春季研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] Estimation of covariance matrix in minimum variance beamforming2020

    • Author(s)
      Hideyuki Hasegawa and Ryo Nagaoka
    • Organizer
      IEEE 2020 International Ultrasonics Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] High-frame-rate imaging for ultrasonic backscatter and functional analyses of vascular system2020

    • Author(s)
      Masaaki Omura, Ryo Nagaoka, Hideyuki Hasegawa, Kenji Yoshida, and Tadashi Yamaguchi
    • Organizer
      IEEE 2020 International Ultrasonics Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Visualization of micro flow channel by plane wave imaging and temporal variance2020

    • Author(s)
      Ryo Nagaoka, Benjamin Meirza, Maria Evertsson, Magnus Cinthio, and Hideyuki Hasegawa
    • Organizer
      IEEE 2020 International Ultrasonics Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Noise suppression in blood speckle imaging by estimation of point spread function of imaging system2020

    • Author(s)
      Michiya Mozumi, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      IEEE 2020 International Ultrasonics Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of two-frequency switchable array probe consisting of piezoelectric elements with polarization-inverted structure for portable ultrasonic equipment2020

    • Author(s)
      Ryo Nagaoka, Shin-Ichiro Umemura, and Hideyuki Hasegawa
    • Organizer
      IEEE 2020 International Ultrasonics Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 熱特性が異なる散乱媒質におけるエコー振幅包絡特性の変動評価2020

    • Author(s)
      大村眞朗,竹内道雄,長岡 亮,長谷川英之
    • Organizer
      日本音響学会アコースティックイメージング研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 超音波エコー振幅分布モデルへの整合誤差の評価による散乱体密度推定精度の向上2020

    • Author(s)
      尾本吉隆,長岡 亮,竹内道雄,坂井俊彦,Andocs Gabor,高雄啓三,長谷川英之
    • Organizer
      日本超音波医学会第93回学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 速度ベクトル推定のための点拡がり関数の畳み込みによる不要エコー抑制の検討2020

    • Author(s)
      茂澄倫也,長岡 亮,長谷川英之
    • Organizer
      日本超音波医学会第93回学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] ラジオ波加熱されたラット腫瘍内の超音波散乱波の統計解析による温度変化測定2020

    • Author(s)
      竹内道雄,坂井俊彦,Gabor Andocs,高雄啓三,長岡 亮,長谷川英之
    • Organizer
      日本超音波医学会第93回学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 特異値分解および時間的分散を用いた微小血管の可視化に関する基礎検討2020

    • Author(s)
      長岡 亮,長谷川英之
    • Organizer
      日本超音波医学会第93回学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Phantom experiments on separation of reflection and scattering components using ultrasonic synthetic aperture imaging2020

    • Author(s)
      Kazunori Nagata, Ryo Nagaoka, Jens. E. Wilhjelm, and Hideyuki Hasegawa
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Investigation of Relationship between Accuracy of 2D Velocity Estimation and Scan Pitch of Ultrasound Image2020

    • Author(s)
      Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, Magnus Cinthio, and Hideyuki Hasegawa
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Preliminary investigation on clutter filtering based on deep learning2020

    • Author(s)
      Hongpeng Wang, Shange Gao, Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Maximum likelihood estimation of scattering strength applied to beamformed ultrasonic signals2020

    • Author(s)
      Hideyuki Hasegawa, Ryo Nagaoka, Masaaki Omura, and Michiya Mozumi
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Non-invasive measurement of temperature elevation inside tumor tissue during oncological hyperthermia treatment by statistical analysis of ultrasonic scattered echoes2020

    • Author(s)
      Michio Takeuchi, Toshihiko Sakai, Gabor Andocs, Tsuyoshi Takanaka, Masashi Taka, Kuniko Yamashita, Masahiro Kawahara, Tomoko Nojiri, Asaka Tanaka, Azusa Norishima, Yoshitaka Omoto, Masaaki Omura, Ryo Nagaoka, Keizo Takao, and Hideyuki Hasegawa
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Basic study on correction of speed of sound in forming of non-cylindrical focus beam2020

    • Author(s)
      Ryo Nagaoka, Shin Yoshizawa, Shin-ichiro Umemura, and Hideyuki Hasegawa
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Evaluation of accuracy in ultrasonic measurement of motion velocity with simulation of blood vessel deformation2020

    • Author(s)
      Kazuma Ishikawa, Michiya Mozumi, Masaaki Omura, Ryo Nagaoka, and Hideyuki Hasegawa, "Evaluation of accuracy in ultrasonic measurement of motion velocity with simulation of blood vessel deformation
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] Simulation study to evaluate variable factors of Nakagami parameter due to temperature change2020

    • Author(s)
      Masaaki Omura, Yoshitaka Omoto, Michio Takeuchi, Ryo Nagaoka, and Hideyuki Hasegawa
    • Organizer
      41th Symposium on Ultrasonic Electronics
    • Related Report
      2020 Research-status Report
  • [Presentation] 静脈血流内の高輝度エコー信号の検出2020

    • Author(s)
      上坂拓実,大村眞朗,長岡 亮,八木邦公,長谷川英之
    • Organizer
      日本音響学会2020年秋季研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 超音波エコー振幅分布への理論分布整合誤差の評価による散乱体密度推定精度の向上2020

    • Author(s)
      "尾本吉隆, 長谷川英之, 長岡 亮, 竹内道雄, 坂井俊彦, Gabor Andocs, 高雄啓三"
    • Organizer
      日本音響学会2020年春季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 表面粗さの評価を目指した偏向平面波送信による反射・散乱成分の分離2020

    • Author(s)
      "栃木一宏, 長岡 亮, 長谷川英之"
    • Organizer
      日本音響学会2020年春季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 血管変形モデルシミュレーションを用いた超音波によるひずみ計測法の精度評価2020

    • Author(s)
      "石川数馬, 長岡 亮, 長谷川英之"
    • Organizer
      日本音響学会2020年春季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 2次高調波成分を用いたContinuous Shear Wave Elastographyに関する基礎検討2020

    • Author(s)
      "長岡 亮, 吉澤 晋, 長谷川英之"
    • Organizer
      日本音響学会2020年春季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 心腔内血流信号強調のための2次元点拡がり関数の推定に関する検討2020

    • Author(s)
      "茂澄倫也, 長岡 亮, 長谷川英之"
    • Organizer
      日本音響学会2020年春季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 超高時間分解能ベクトルフローマッピング法による心臓内血流ダイナミクスと2次元速度情報の評価2020

    • Author(s)
      "長岡 亮, 茂澄倫也, 長谷川英之"
    • Organizer
      第13回血流会
    • Related Report
      2019 Research-status Report
  • [Presentation] 血流計測テクノロジーの開発と基礎的検討2020

    • Author(s)
      "長谷川英之"
    • Organizer
      第13回血流会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Quantitative cardiac blood flow imaging with high frame rate ultrasound2019

    • Author(s)
      "Hideyuki Hasegawa and Ryo Nagaoka"
    • Organizer
      178th Meeting of the Acoustical Society of America
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Validation of effect of different beamforming on backscatter coefficient analysis2019

    • Author(s)
      "Masaaki Omura, Hideyuki Hasegawa, Ryo Nagaoka, Kenji Yoshida, and Tadashi Yamaguchi"
    • Organizer
      IEEE International Ultrasonics Symposium 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Construction of an ultrasound phantom with micrometer sized wall-less vessels2019

    • Author(s)
      "Benjamin Meirza, Hideyuki Hasegawa, Maria Evertsson, Sandra Sjostrand, and Magnus Cinthio"
    • Organizer
      IEEE International Ultrasonics Symposium 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Recent developments in adaptive beamforming2019

    • Author(s)
      "Hideyuki Hasegawa"
    • Organizer
      IEEE International Ultrasonics Symposium 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Visualization of blood flow velocity vectors in human heart using high frame rate ultrasound imaging and vector flow mapping2019

    • Author(s)
      "Ryo Nagaoka, Michiya Mozumi, and Hideyuki Hasegawa"
    • Organizer
      IEEE International Ultrasonics Symposium 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Cardiac blood flow imaging using very high frame rate ultrasound2019

    • Author(s)
      "Hideyuki Hasegawa, Ryo Nagaoka, and Michiya Mozumi"
    • Organizer
      2019 International Congress on Ultrasonics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of size of transmit aperture on estimation of ultrasonic speed of sound in diffuse scattering medium2019

    • Author(s)
      "Hideyuki Hasegawa and Ryo Nagaoka"
    • Organizer
      2019 International Congress on Ultrasonics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Very high frame rate ultrasound for medical diagnostic imaging2019

    • Author(s)
      "Hideyuki Hasegawa"
    • Organizer
      International Conference of Electrical and Electronic Engineering 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Michiya Mozumi, Ryo Nagaoka, and Hideyuki Hasegawa2019

    • Author(s)
      "Michiya Mozumi, Ryo Nagaoka, and Hideyuki Hasegawa"
    • Organizer
      International Conference on Electric and Electronic Engineering 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characteristic analysis on linear regression beamformer2019

    • Author(s)
      "Hideyuki Hasegawa and Ryo Nagaoka"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Anti-aliasing method for 2D phase-sensitive motion estimator in ultrasound measurement2019

    • Author(s)
      "Michiya Mozumi, Ryo Nagaoka, Magnus Cinthio, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Basic study on differentiation of reflection and scattering components by synthetic aperture method using spherically diverging transmit beams2019

    • Author(s)
      "Kazunori Nagata, Ryo Nagaoka, Jens Erik Wilhjelm, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Non-invasive measurement of temperature elevation inside tumor tissue of living rat induced by radiofrequency current heating based on statistical analysis of ultrasonic scattered echoes2019

    • Author(s)
      "Michio Takeuchi, Toshihiko Sakai, Gabor Andocs, Keizo Takao, Ryo Nagaoka, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Basic study on estimation method of shear stress in carotid artery using blood flow imaging2019

    • Author(s)
      "Ryo Nagaoka, Kazuma Ishikawa, Michiya Mozumi, Magnus Cinthio, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Examination of effectiveness of signal-to-noise ratio factor in estimation of sound speed of medium2019

    • Author(s)
      "Fumitada Sannnou, Ryo Nagaoka, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Study on speckle reduction of medical ultrasound images using deep learning with fully convolutional network2019

    • Author(s)
      "Kazuma Ando, Ryo Nagaoka, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] Accuracy evaluation of 3D velocity estimation by multi-frequency phase tracking method with matrix array probe2019

    • Author(s)
      "Soichiro Nunome, Ryo Nagaoka, and Hideyuki Hasegawa"
    • Organizer
      40th Symposium on Ultrasonic Electronics
    • Related Report
      2019 Research-status Report
  • [Presentation] 高時間分解能超音波計測による腹部大動脈の脈波伝搬イメージング2019

    • Author(s)
      "茂澄倫也,長岡 亮,長谷川英之"
    • Organizer
      電子情報通信学会超音波研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 超高速超音波断層法による左心室内血流動態の可視化2019

    • Author(s)
      "長岡 亮,茂澄倫也,石川数馬,長谷川英之"
    • Organizer
      日本超音波医学会第40回中部地方会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 高時間分解能超音波イメージングを用いた血球の粒子サイズと圧力との関係に関する基礎検討2019

    • Author(s)
      "長岡 亮,大村眞朗,山口 匡,長谷川英之"
    • Organizer
      日本音響学会2019年秋季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 配列型振動子を用いた音速推定における諸条件の検討2019

    • Author(s)
      "参納史匡,長岡 亮,長谷川英之"
    • Organizer
      日本音響学会2019年秋季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 心腔内血流計測のための特異値分解クラッタフィルタの空間分割化に関する検討2019

    • Author(s)
      "茂澄倫也,長岡 亮,長谷川英之"
    • Organizer
      日本音響学会2019年秋季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 2種送信波を用いた開口合成法に関する基礎的検討2019

    • Author(s)
      "長谷川英之,長岡 亮"
    • Organizer
      電子情報通信学会 超音波研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 並列ビーム形成技術とその応用2019

    • Author(s)
      "長谷川英之,長岡 亮"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 血管エコーの基礎工学 -Bモード法から新技術まで2019

    • Author(s)
      "長谷川英之,長岡 亮"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 超高速超音波断層法による心臓内血流ダイナミクスと流速ベクトルの可視化2019

    • Author(s)
      "長岡 亮,茂澄倫也,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 特異値分解を用いた頸動脈内腔領域抽出2019

    • Author(s)
      "長岡 亮,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 心腔内血流イメージングのための空間基底画像を用いた特異値分解クラッタフィルタ2019

    • Author(s)
      "茂澄倫也,長岡 亮,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 素子信号間相関性評価による音速推定の平面波イメージングへの適用2019

    • Author(s)
      "長谷川英之,長岡 亮"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 深層学習を用いたスペックル除去手法の検討2019

    • Author(s)
      "安藤数真,長岡 亮,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 心臓壁振動の計測における不要エコーの影響に関する基礎検討2019

    • Author(s)
      "茂澄倫也,長岡 亮,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 脈派の反射波成分の検出に関する基礎検討2019

    • Author(s)
      "長岡 亮,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 生体の深部加温実験における超音波散乱波の統計的解析による内部温度変化測定2019

    • Author(s)
      "竹内道雄,坂井俊彦,Gabor Andocs,高雄啓三,長岡 亮,長谷川英之"
    • Organizer
      日本超音波医学会第92回学術集会
    • Related Report
      2019 Research-status Report
  • [Book] 医療AIとディープラーニングシリーズ 超音波画像AI診断2021

    • Author(s)
      藤田 広志、椎名 毅、工藤 正俊
    • Total Pages
      198
    • Publisher
      オーム社
    • ISBN
      9784274225765
    • Related Report
      2021 Annual Research Report
  • [Remarks] 富山大学 工学部 工学科 知能情報工学コース 医用情報計測学研究室

    • URL

      http://www3.u-toyama.ac.jp/hase/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 富山大学工学部工学科知能情報工学コース長谷川研究室

    • URL

      http://www3.u-toyama.ac.jp/hase/index.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 富山大学 工学部工学科 知能情報工学コース 長谷川研究室

    • URL

      http://www3.u-toyama.ac.jp/hase/

    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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