在生物组织中辐射的水冷偶极子的电磁和热模型。

Electromagnetic and thermal models of a water-cooled dipole radiating in a biological tissue.

作者信息

Gentili G B, Gori F, Leoncini M

机构信息

Department of Electronics Engineering, University of Florence, Italy.

出版信息

IEEE Trans Biomed Eng. 1991 Jan;38(1):98-103. doi: 10.1109/10.68216.

DOI:10.1109/10.68216

PMID:2026439

Abstract

An insulated, water-cooled dipole, radiating in a biological tissue, is analyzed with a theoretical electromagnetic and thermal model. The SAR and temperature distributions are calculated taking into account the effect of the water flowing inside the applicator. The steady-state temperatures in a dissipative medium, interacting with the dipole, are evaluated for several thicknesses of the external casing, water temperatures and blood perfusions. A correct design of the external casing thickness and a proper choice of the temperature and flow velocity of water allows to control the wall temperature of the applicator within physiological limits. The influence of the blood perfusion on the temperature distribution is investigated.

摘要

利用理论电磁和热模型分析了在生物组织中辐射的绝缘水冷偶极子。在考虑施加器内部水流影响的情况下计算比吸收率（SAR）和温度分布。针对外部套管的几种厚度、水温及血液灌注情况，评估了与偶极子相互作用的耗散介质中的稳态温度。正确设计外部套管厚度并适当选择水的温度和流速，可将施加器的壁温控制在生理限度内。研究了血液灌注对温度分布的影响。