Measurement of Displacement and Strain in Biological Tissue Generated by Ultrasound Dual Acoustic Radiation Force
Measurement of Displacement and Strain in Biological Tissue Generated by Ultrasound Dual Acoustic Radiation Force
复制标题
超声双声辐射力产生的生物组织位移和应变的测量
DOI：
10.1007/s10396-012-0372-9
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发表时间：
2012
影响因子：
1.8
通讯作者：
and Hiroshi Kanai
中科院分区：
文献类型：
--
作者：
Jun Yamaguchi;Hideyuki Hasegawa;and Hiroshi Kanai
方法当单一的声辐射力作用于生物组织时，并不能有效地产生应变（变形），因为一次声辐射力不仅产生应变，而且使位移空间梯度为零（无应变）的组织的位置发生变化。在本研究中，为了在物体中有效产生应变，由频率为f 0 和(f 0+ Δf)的两束连续超声波束诱导的两个声辐射力从两个不同方向同步施加到物体的两个不同位置，如图1所示[7]。因此，被以 Δf 频率振荡的两个声辐射力挤压的区域沿着水平轴被压缩。对于生物组织，例如肌肉和肌腱，由于其不可压缩性而发生垂直膨胀。
MethodWhen a single acoustic radiation force is applied to biological tissues, strain (deformation) is not generated effectively, because one acoustic radiation force generates not only strain but also a change in the position of the tissue that has zero spatial gradient in displacement (no strain). In this study, for effective generation of strain in an object, two acoustic radiation forces, which were induced by two continuous ultrasound beams at frequencies of f 0 and (f 0+ Δf), were synchronously applied to two different positions in the object from two different directions, as shown in Fig. 1 [7]. The region pinched by two acoustic radiation forces oscillating at a frequency of Δf was therefore compressed along the horizontal axis. In the case of biological tissues, such as muscle and tendons, vertical expansion occurred due to their incompressibility.