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首页> 外文期刊>IEEE Transactions on Biomedical Engineering >Comparison of finite-difference time-domain SAR calculations with measurements in a heterogeneous model of man
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Comparison of finite-difference time-domain SAR calculations with measurements in a heterogeneous model of man

机译：有限差分时域SAR计算与人异质模型中测量值的比较

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摘要

A finite-difference time-domain technique was used to calculate the specific absorption rate (SAR) at various sites in a heterogeneous block model of man. The block model represented a close approximation to a full-scale heterogeneous phantom model. Both models comprised a skeleton, brain, lungs, and muscle. Measurements were conducted in the phantom model using an implantable electric-field probe and a computer-controlled data acquisition system. The calculation and measurement of SAR distributions were compared primarily in the head (including the neck) and chest. To obtain the necessary spatial resolution with the computer model, the head and neck were modeled with approximately 105000 cells while 86000 cells were used to configure the chest. Planewave fields, polarized in the E orientation, were utilized to irradiate the models at an exposure frequency of 350 MHz. Reasonable correlation existed between the calculations and measurements.
机译：时域有限差分技术用于计算人异质区模型中各个部位的比吸收率（SAR）。块模型代表了与全尺寸异质模型的近似。两种模型都包括骨骼，大脑，肺部和肌肉。使用可植入电场探头和计算机控制的数据采集系统在幻像模型中进行测量。 SAR分布的计算和测量主要在头部（包括颈部）和胸部进行比较。为了使用计算机模型获得必要的空间分辨率，使用大约105000个细胞对头部和颈部进行建模，而使用86000个细胞来配置胸部。利用在E方向极化的平面波场以350 MHz的曝光频率照射模型。计算和测量之间存在合理的相关性。

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