微波激励热声成像中微波源参数选择的理论分析

The selection of microwave source parameters in microwave-induced thermoacoustic tomography

分析了微波激励热声成像中激励源参数对成像质量和对比度的影响,探讨使用理论和计算方法来选择微波激励源参数。首先从理论上分析微波激励源参数对成像质量的影响和微波源参数的选择标准,然后从微波热声成像的自身特点、微波对于人体的安全标准以及工程应用的可行性的角度出发,对一些关键参数进行理论计算得出参数选择的参考范围,同时指出进行参数选择时的关键影响因素。

This paper analyzes the effect of microwave source on imaging quality in microwave-induced thermoacoustic tomography. Based on theory analysis and computation, an integrated method on the selection of microwave source parameters is obtained. At first, the theory of the selective reference of the microwave source parameters is analyzed and discussed. Then from the point of view of character of thermoacoustic tomography, the safety standards when microwave act on human body and the feasibility of the engineering application, some key parameters are calculated and the reasonable range of parameters is obtained. At the same time, the essential factors on selecting the microwave source parameters are pointed out.