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热场分布是检验热疗辐射器优劣的主要判据，而目前商品机多不给定量热场图，使用时有较大盲目性。因此，研究热场分布测量方法具有重要的实际意义。本文分析了热疗辐射器对活体组织和等效体模加热的温升规律。指出要获得较佳的治疗效果，辐射器必须有较好的ＳＡＲ热场分布特性。本文提出用空间点阵法快速获得组织体模内ＳＡＲ三维热场分布，介绍了其测量原理和数据处理方法及用于该方法的单针多点测温探针原理和多点测温探针组排及装置；最后以腔道（宫颈）微波热疗辐射器为例给出了用空间点阵法测量其在等效肌肉体模中三维热场分布的实验结果。本文所用测量方法较之目前国外使用的“分开体模兼热象二维测定法”和“体模内埋设空心塑料管法”有无需打开体模、测量迅速及有较好测温精度（±０．２℃）与空间分辨率（２ｍｍ），尤其是可得到三维热场分布图像等优点。该方法和装置已用于研制具有优质热场的腔道辐射器，并在肿瘤热疗中优选辐射器和治疗方案实践获得较好效果。
Thermal field distribution is the main criterion for checking the pros and cons of hyperthermia radiators. At present, commercial machines do not give quantitative heat field maps, and they have greater blindness when used. Therefore, it is of great practical significance to study the thermal field distribution measurement method. This article analyzes the law of temperature rise of hyperthermia radiators for living tissue and equivalent phantom heating. It is pointed out that in order to obtain a better therapeutic effect, the radiator must have a good SAR thermal field distribution. In this paper, the three-dimensional thermal field distribution of SAR in tissue phantom is obtained rapidly by using space lattice method, and the measurement principle and data processing method are introduced. The principle of single-needle multi-point temperature probe and multi-point temperature probe are used in this method. The group row and device; Finally, the cavity (cervix) microwave hyperthermia radiator was taken as an example to give experimental results of the spatial lattice method for measuring the three-dimensional thermal field distribution in the equivalent muscle phantom. The measurement method used in this paper has the advantages of no need to open the phantom, rapid measurement, and good temperature measurement accuracy compared to the existing “separate phantom and thermal image two-dimensional measurement method” and “hollow plastic tube embedded in phantom” used abroad. 0.2°C) and spatial resolution (2mm), especially 3D thermal field distribution images, etc. The method and device have been used to develop a cavity radiator with a high quality thermal field, and the radiator and the treatment plan are preferred in the tumor hyperthermia for better results.