Air Gap Filler Material for Hot Spot Reduction in the Capacitive Heating Device

K. Kumagae, K. Saito
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引用次数: 2

Abstract

In capacitive heating, an air gap between a human body and a bolus often causes a concentration of a current and brings an injury. An air gap frequently disrupts a treatment and inhibits an output power of the hyperthermic device. Therefore,an air gap filler material has been developed. In this paper,we calculated some models to investigate relations between properties of air gap filler materials and their heating characteristics. In the process,we created several analytical models,which have different contact situations between the human body and the bolus. In the gap filler material insertion models,we developed various types of models,which have different electrical constants and sizes. We calculated current distributions and the SAR distributions of these analytical models. From the results of calculations,we found that an air gap affects the heating characteristics and an air gap filler material can improve heating patterns. Moreover,we confirmed that an air gap filler material,which has low conductivity and larger diameter than bolus,is the most effective in this scenario.
电容式加热装置中用于减少热点的气隙填充材料
在电容式加热中,人体和电瓶之间的气隙常常会引起电流的集中并造成伤害。气隙经常中断处理并抑制热疗装置的输出功率。因此,研制了一种气隙填充材料。本文通过计算模型,研究了气隙填充材料的性能与其加热特性之间的关系。在这个过程中,我们创建了几个分析模型,这些模型有不同的人体与丸剂的接触情况。在间隙填充材料插入模型中,我们开发了各种类型的模型,它们具有不同的电常数和尺寸。我们计算了这些分析模型的电流分布和SAR分布。计算结果表明,气隙会影响加热特性,而气隙填充材料可以改善加热模式。此外,我们证实了在这种情况下,电导率低且直径大于bolus的气隙填充材料是最有效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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