Problems in Deriving the Soft-Tissue Thermal Index Using Spatial-Peak Temporal-Average Intensity in the Near Field
Problems in Deriving the Soft-Tissue Thermal Index Using Spatial-Peak Temporal-Average Intensity in the Near Field
复制标题
利用近场空间峰值时间平均强度推导软组织热指数的问题
DOI：
10.1143/jjap.48.07gk04
复制
发表时间：
2009
影响因子：
1.5
通讯作者：
M. Yoshioka
中科院分区：
文献类型：
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作者：
M. Yoshioka
通过模拟圆形换能器辐射的超声场，研究了利用空间峰值强度计算软组织热指数(TIS)的问题。TIS提供了软组织温升的信息，用于诊断超声设备的安全评估。为了在TIS推导过程中正确估计最高温升深度，有必要将空间峰值强度测量的断点深度减小到靠近换能器的位置。然而，如果TIS仍然是由空间峰值强度得出的，那么深度就不能被估计出来，而TIS的高估则通过减小断点深度来揭示。结果表明，要克服这些问题，应利用近场的空间平均强度来推导TIS。
Problems in deriving soft-tissue thermal index (TIS) using spatial-peak intensity are investigated by simulations of ultrasonic fields radiated from circular transducers. TIS gives information about the temperature rise in soft tissues for the safety evaluation of diagnostic ultrasonic equipment. To estimate the depth of highest temperature rise properly in the TIS derivation process, it is necessary to reduce the break-point depth of spatial-peak intensity measurement to the point close to the transducer. However, if TIS remains to be derived from spatial-peak intensity, the depth cannot be estimated and the overestimation of TIS is revealed by reducing the break-point depth. It is shown that TIS should be derived using spatial-average intensity in the near field to overcome these problems.
采用辐射力平衡法测量高超声功率吸收目标的超声功率
DOI：
--
发表时间：
2022
期刊：
影响因子：
--
作者：
N. Osaka;M. Ozawa;T. Matsuyama;K. Wada;K. Okamoto;A. Kawakita;K. Murata;and K. Sugimoto;Takeyoshi Uchida
通讯作者：
Takeyoshi Uchida