Ultrasound Transmission Beam Computed Tomography for the In-situ Sound Speed Quantitative Diagnostic Imaging of Abdominal Tissue

超声透射束计算机断层扫描用于腹部组织原位声速定量诊断成像

• 批准号: 17560367
• 负责人: YAMADA Akira
• 金额: $ 2.24万
• 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: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560367/
• 关键词: Ultrasonic computed tomography; Underdetermined inverse problem; Straight ray propagation model tomography; Visceral fat diagnosis; Smoothed path algebraic reconstruction technique; Metabolic syndrome diagnosis; Abdominal sound speed tomography; Me

Abdominal sound speed tomographic imaging using through-transmission travel time data on the body surface was investigated. To this end, a hundred kHz range low-frequency wave was used to reduce the wave attenuation within an inner body medium. A method was investigated for the reconstruction of the image with the smallest possible number of path data around the abdominal surface. Specifically, the data from a strong scattering spinal cord should be avoided. To fulfill the requirement, the smoothed path algebraic reconstruction technique was introduced. The validity of this method was examined both on the numerically synthesized data and the experimentally measured data for the phantom specimen and actual human subject. It was shown that an abdominal tomographic sound speed image could be successfully obtained by preparing only 32 transducer locations at the circumference around the abdominal surface and their combination of less than 100 number of observation path data as well as by avoiding the data intersecting the spinal cord. In addition, fat regions were extracted having a sound speed lower than the threshold value to demonstrate the possibility of this method for metabolic syndrome diagnosis.

研究了使用体面的跨传输旅行时间数据进行腹部音速层析成像。为此，使用一百kHz范围的低频波来减少内体介质内的波衰减。研究了一种方法，以重建图像，该图像具有最少数量的腹表面路径数据的方法。具体而言，应避免来自强散射脊髓的数据。为了满足要求，引入了平滑的路径代数重建技术。在数值合成的数据和幻影标本和实际人类受试者的实验测量数据上检查了该方法的有效性。结果表明，仅在腹表面周围的圆周位置准备32个换能器位置，并且它们组合少于100个观察路径数据以及避免避免脊髓的数据相交，可以成功获得腹部断层扫描速度图像。此外，提取脂肪区的声速低于阈值，以证明这种代谢综合征诊断的可能性。

项目成果

Evaluation Experiment of Ultrasound Computed Tomography for Abdominal Sound Speed Imaging

超声计算机断层扫描腹部声速成像评价实验

• 发表时间: 2007
• 期刊: Jpn.J.Appl.Phys. 46・7B(Accepted for publication)
• 作者: K.Nogami;A.Yamada
• 通讯作者: A.Yamada

Ultrasound Travel Time Tomography for the Sound Speed Abdominal Imaging

用于声速腹部成像的超声旅行时间断层扫描

• 发表时间: 2007
• 期刊: 2007 Int. Conf. Ultrasonic (CD-ROM)
• 作者: A.Yamada;K.Nogami
• 通讯作者: K.Nogami

Ultrasound Travel Time Tomography for the Sound Speed Imaging of the Human Body

用于人体声速成像的超声走时断层扫描

• 发表时间: 2006
• 期刊: 9th West. Pacific Acoust. Conf. (CD-ROM)
• 作者: A.Yamada;K.Nogami
• 通讯作者: K.Nogami

照射角制限性能の高い透過型超音波逆散乱CT

高照射角限制性能的透射式超声逆散射CT

• 发表时间: 2005
• 期刊: 超音波TECHNO 7・1
• 作者: 山田 晃