Wu J, Chase J D, Zhu Z, Holzapfel T P
Department of Physics, University of Vermont, Burlington 05405.
Ultrasound Med Biol. 1992;18(5):495-512. doi: 10.1016/0301-5629(92)90089-s.
The temperature elevation in a homogeneous tissue-mimicking material with tissue-like thermal and acoustic properties, generated by unfocused and focused ultrasonic transducers operating at 1.0 and 3.5 MHz frequencies, was measured. It was found that in the vicinity of a transducer front face, both transducer surface heating and ultrasound absorption are important sources for tissue heating. As for heating due to ultrasound absorption, the experimental results are compared with theoretical predictions for nonperfused tissues resulting from different beam models. The experimental data are in reasonable agreement with the results calculated from a model developed by Nyborg and Steele, a Gaussian beam model and from the model used by the National Council on Radiation Protection and Measurements (NCRP).
测量了在具有类似组织热学和声学特性的均匀仿组织材料中，由工作频率为1.0和3.5MHz的非聚焦和聚焦超声换能器产生的温度升高情况。结果发现，在换能器正面附近，换能器表面加热和超声吸收都是组织加热的重要来源。至于超声吸收引起的加热，将实验结果与不同波束模型得出的非灌注组织的理论预测进行了比较。实验数据与由Nyborg和Steele开发的模型、高斯波束模型以及美国国家辐射防护与测量委员会（NCRP）使用的模型计算出的结果合理吻合。
