Superficial heat reduction technique for a hybrid microwave-optical device.
Superficial heat reduction technique for a hybrid microwave-optical device.
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混合微波光学器件的表面热还原技术。
DOI：
10.1109/embc.2013.6610359
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Al-Armaghany A
中科院分区：
文献类型：
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作者：
Al-Armaghany A
提出了圆极化微带贴片天线形式的微波施加器，以在生物组织中提供局部深层加热，这导致血管扩张，从而导致组织氧合的变化。这些变化由集成光学系统监测，用于研究人体不同部位的温度调节。利用计算机模拟，本文比较了圆极化和线极化天线的沉积电磁（EM）能量和加热模式的效率。生物模型由皮肤、脂肪和肌肉层组成，具有适当的介电和热特性。结果表明，对于相同的比吸收率（SAR）在肌肉中，圆极化天线的结果比线极化天线在皮肤-脂肪界面的SAR较低。根据生物热方程，给出了热分布。所提出的圆极化天线示出了与线极化天线相比在表层中的热减少。
Microwave applicator in the form of a circularly polarized microstrip patch antenna is proposed to provide localized deep heating in biological tissue, which causes blood vessels to dilate leading to changes in tissue oxygenation. These changes are monitored by an integrated optical system for studying thermoregulation in different parts of the human body. Using computer simulations, this paper compares circularly and linearly polarized antennas in terms of the efficiency of depositing electromagnetic (EM) energy and the heating patterns. The biological model composes of the skin, fat and muscle layers with appropriate dielectric and thermal properties. The results show that for the same specific absorption rate (SAR) in the muscle, the circularly polarized antenna results in a lower SAR in the skin-fat interface than the linearly polarized antenna. The thermal distribution is also presented based on the biological heat equation. The proposed circularly polarized antenna shows heat reduction in the superficial layers in comparison to the linearly polarized antenna.