Visceral fat inspection method based on the ultrasound tomographic reconstruction of abdominal tissue sound speed image

基于腹部组织声速图像超声断层重建的内脏脂肪检查方法

• 批准号: 22560414
• 负责人: YAMADA Akira
• 金额: $ 2.91万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560414/
• 关键词: 計測システム; 音波トモグラフィ; 内蔵脂肪検査; 超音波腹部スキャナー; 腹部断面音速分布映像; 超音波CT; 超音波画像診断; 超音波トモグラフィ; 医用超音波画像診断; 内蔵脂肪症診断; 音波伝搬時間測定; 生体組織音速の映像化; 計算機画像再構成; 人体腹部断面の可視化; 生体弾性物理量計測; 内臓脂肪症(メタボリック症)診断; 生体組織音速分布の映像化; 生体弾性物理量の非侵襲計測

In the present study, investigations and validation experiments were made for the realization of acoustic tomographic visceral fat inspection apparatus based on the observation of ultrasound time of flight data around human abdominal surface. In particular, mechanical scanning system using a facing pair of high sensitivity broad band piezoelectric transducers in low frequency range was developed, so that waves propagated through the long distant intestinal gaseous medium can be detected without suffering sound attenuation. In addition, urethane gel hemi-spheres were attached in front of the transducers to keep good contact between transducer and body surface, regardless of contact angles between them. The facing pair transducers attached on the automated actuator stages for the movement of rotation (720 mm in diameter), translation (600 mm stroke), and pushing (300 mm stroke) were controlled by the computers to move to arbitral positions on the abdominal body surface. On this occasion, … More to minimize the loss of data caused by the avoidance of sound propagation paths intersecting a spine, propagation path was determined so that center of scanning rotation was adjusted to the spine. To this end, contour of the body surface was measured by laser range sensor and spine position was estimated in advance. By this means, the paths were adaptively determined in accordance with patient’s body size and sitting position. In addition, amplitudes of the sound waves were monitored so that contact condition can be controlled at an optimalpushing position regardless of the deviation of the premeasured body surface position. Finally, from the evaluation experiments by using the phantom specimen, it was shown that the measured precision of time of flight data were good enough to reproduce the abdominal sound speed cross sectional profile image. In addition, validity of the proposed visceral fat measurement techniques was confirmed from the results that fat areas can be clearly discriminated from the remaining protein areas with high degree of accuracy. Although the evaluation experiments for human patients were remained as future work, the system was brought to completion which can automatically collect the sound wave data around body surface andmeasure the visceral fat area from the abdominal reconstructed sound speed image. Less

在本研究中，调查和验证实验的基础上，实现超声断层内脏脂肪检测装置的超声飞行时间数据在人体腹部表面的观察。特别地，开发了在低频范围内使用面对的一对高灵敏度宽带压电换能器的机械扫描系统，使得可以检测通过长距离肠气体介质传播的波而不遭受声音衰减。此外，将聚氨酯凝胶半球附着在换能器前面，以保持换能器与体表之间的良好接触，而不管它们之间的接触角如何。连接在自动致动器平台上的用于旋转（直径720 mm）、平移（600 mm冲程）和推动（300 mm冲程）运动的相对对换能器由计算机控制以移动到腹部身体表面上的任意位置。在这一场合， ...更多信息 为了最小化由于避免声音传播路径与脊柱相交而导致的数据损失，确定传播路径，使得扫描旋转的中心被调整到脊柱。为此，通过激光测距传感器测量身体表面的轮廓，并预先估计脊柱位置。通过这种方法，根据患者的体型和坐姿自适应地确定路径。此外，声波的振幅进行了监测，以便接触条件可以控制在一个最佳的pushing位置，而不管预先测量的身体表面位置的偏差。最后，通过使用体模标本的评估实验，表明飞行时间数据的测量精度足够好，以再现腹部声速横截面轮廓图像。此外，从脂肪区域可以以高精度从剩余蛋白质区域清楚地区分的结果证实了所提出的内脏脂肪测量技术的有效性。虽然对人体的评估实验仍是未来的工作，但该系统已经完成，可以自动收集身体表面周围的声波数据，并从腹部重建的声速图像测量内脏脂肪面积。少

项目成果

「Quasi real time monitoring system for the tomographic reconstruction of the vortex wind field」

《涡旋风场层析重建准实时监测系统》

• 发表时间: 2012
• 作者: Haiyue Li;Takuya Hirasawa and Akira Yamada
• 通讯作者: Takuya Hirasawa and Akira Yamada

Body Surface Automated Mechanical Scanner for the Abdominal Sound Speed Tomographic Imaging

用于腹部声速断层成像的体表自动机械扫描仪

• 发表时间: 2013
• 作者: T. Yoyama;K. Sasaki;D.Shimizu;H. Li and A.Yamada
• 通讯作者: H. Li and A.Yamada

体表上走査腹部組織音速トモグラフィ映像の再現性能向上のための検討

提高体表扫描腹部组织声波断层扫描图像再现性能的研究

• 发表时间: 2011
• 作者: 和田;山田;島袋;坂野
• 通讯作者: 坂野

Closely-contact body surface scanning mechanism for the acoustic tomographic measurement of the visceral fat area

用于内脏脂肪面积声学断层测量的紧密接触体表扫描机构

• 发表时间: 2011
• 作者: T.Shimabukuro;K.Sasaki;T.Yokoyama;A.Yamada
• 通讯作者: A.Yamada

生体組織音速の非侵襲音波トモグラフィ計測

无创声学断层扫描测量活体组织中的声速