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마이크로파 재구성 네트워크를 이용한 암 진단 및 치료

Detection and Hyperthermia of Cancer Using Microwave Reconfigurable Network

김기현|권영우
에스케이텔레콤 (주) (SKTelecom)|2010.10|Telecommunications Review|제20권 제5호|pp. 823-835

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키워드

MEMS온열요법복소 유전율HyperthermiaComplex permittivityMulti-state Reflectometer임피던스 튜너Multi-state reflectometerImpedance tuner
주제분류전자/정보통신공학

초록

본 논문에서는 대표적인 마이크로파 재구성 네트워크 회로인 임피던스 튜너를 이용하여 암 진단 및 치료에 적합한시스템을 제안한다. 암은 정상 조직과 광대역 복소 유전율에 큰 차이가 있으므로 이를 측정함으로써 진단이 가능하다. 이를 위해 multi-state reflectometer에 대해 살펴보고 임피던스 튜너를 이용하여 광대역 복소 유전율 측정에 적합한multi-state reflectometer를 제시한다. 제안한 시스템과 방법을 검증하기 위해 0.9% 생리식염수를 측정하였으며 그결과로부터 0.5GHz에서 25GHz까지 정확한 복소 유전율 측정이 가능함을 확인하였다. 또한 임피던스 튜너를 이용하여 암 치료를 위한 온열요법의 효율을 높일 수 있는 방법을 설명한다. 제안한 시스템의 성능을 극대화하기 위해 임피던스 튜너는 저손실, 넓은 임피던스 변환 성능을 가져야 하며 이에 가장 적합한 MEMS 공정을 이용하여 구현한 임피던스 튜너에 대해 소개한다.

Abstract

This paper presents system for detection and hyperthermia of cancer using microwave impedance tuners. The broadband complex permittivity of cancer forms a striking contrast with that of normal tissue, thus can be used to diagnose cancer. We did analysis on multi-state reflectometer and propose a multi-state reflectometer with impedance tuner for broadband complex permittivity measurements. In order to verify the proposed system, we measured the complex permittivity of 0.9% saline using the proposed system. The measured results agreed well with the expected value of the Cole-Cole equation from 0.5GHz to 25GHz, clearly signify the aptness of the system for detection of cancer. In addition, an impedance tuner can increase the efficiency of hyperthermia for cancer treatment. For performance enhancement of these applications, low-loss MEMS impedance tuners with wide tuning range are presented.

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