2450MHz微波对子宫模型内照射的比吸收率(SAR)分布

THE SAR DISTRIBUTION OF WOMAN UTERUSMODELS EXPOSED TO MICROWAVES

通过模型实验，应用热测量法测定了实际尺寸的模拟子宫腔受２４５０ＭＨｚＶ形天线辐照时的ＳＡＲ分布．实验结果表明，腔内最大受热内区域并非出现在子宫腔底部，而是出现在天线馈电点附近，该处每瓦净功率产生的ＳＡＲ为３３．２Ｗ／ｋｇ，为宫腔底的２．７倍．因此在临床应用时，如果输入功率过大。

A fullsized woman uterus model was irradiated by a Vdipole radiator and the SAR distributions on the walls of the model were determined using thermographic method.The experimental results show that the highest heated area is not on the bottom of the model,but near the feedpoint of the radiator,where the maxiumu SAR is 33.2W/kg for per watt net power.This area may be burn if high power is used in clinic conditions.