Biocompatibility analysis of a battery less back-mountable DBS device

2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE) Pub Date : 2016-12-01 DOI:10.1109/ICECTE.2016.7879584

Senjuti Rahman, Farha Khushi, Kamal Hosain

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Abstract

In this paper, the biocompatibility of a battery less back-mountable deep brain stimulation (DBS) device is analyzed. To conduct the work, a circular planar inverted F antenna (PIFA) at the resonance frequency of 915 MHz is proposed. The dimension of the antenna is 20 × 19. 8904 × 1. 5mm3. In the proposed antenna, the radiating layer is meandered, and FR-4 material with εr = 4.18, tanδ = 0.02 is used as the substrate with a thickness of 1.5 mm. The bandwidth of the designed antenna is 56.71 MHz at a return loss of −10 dB in free space. Functional and biological aspects are considered here. The functional aspect includes input impedance, resonance frequency, gain pattern, radiation efficiency of the antenna, and the biological aspect involves electric field distribution, and SAR value. A complete rat model is used here. Safety regulation is verified in this paper by the specific absorption rate (SAR) distribution in tissues surrounding the back-mountable passive DBS device. The finite difference time domain (FDTD) based EM simulation software XFdtd is used to determine the electric field distributions which has an impact on the SAR value.

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一种无电池背装DBS装置的生物相容性分析

本文对一种无电池背装式脑深部刺激装置的生物相容性进行了分析。为此，提出了一种谐振频率为915 MHz的圆形平面倒F天线(PIFA)。天线尺寸为20 × 19。8904 × 1。5 mm3。天线的辐射层呈弯曲状，基片采用εr = 4.18, tanδ = 0.02的FR-4材料，厚度为1.5 mm。设计的天线带宽为56.71 MHz，自由空间回波损耗为−10 dB。这里考虑了功能和生物学方面。功能方面包括天线的输入阻抗、谐振频率、增益方向图、辐射效率等;生物学方面包括电场分布、SAR值等。这里使用的是一个完整的大鼠模型。本文通过背贴式无源DBS装置周围组织的比吸收率(SAR)分布验证了其安全性。利用基于时域有限差分(FDTD)的电磁仿真软件XFdtd确定对SAR值有影响的电场分布。

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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2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE)

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