射频加热治疗肿瘤体模实验的数值模拟

Numerical simulation of tissue-equivalent material experiments for radio frequency hyperthermia of tumors

目前射频加热治疗肿瘤在临床研究方面已取得了相当大的进展 ,但在热物理方面所做的研究还较少。为了能更有效地指导临床实践 ,对射频加热治疗肿瘤的体模实验进行了描述 ,对体模内的电场和热场进行了分析 ,建立了二维的似稳电场模型和热物理模型 ,用有限元方法对体模实验进行了模拟计算 ,获得了电磁波能量在体模中的比吸收率和体模实验稳态时的温度场。模拟计算的结果和实验结果相比较达到了接近实用的精度 。

Radio frequency hyperthermia of tumors has progressed rapidly in clinical practice, but the related thermal physical research lags far behind. This paper describes tissue-equivalent material experiments for radio frequency hyperthermia of tumors, and analyzes the electric field and the thermal field in the tissue-equivalent material with the quasi-steady electric field and thermal physical models with numerical simulations of the experiments using the finite element method. The energy SAR (specific absorption rate) and the steady-state temperature distribution in the tissue-equivalent material were calculated. The precision of the numerical simulation is promising for clinical applications.