Antenna Array Hyperthermia System-Design and Preliminary Performance Test

• Main Authors: Richard Y. Wang, 王岳華
• Other Authors: Lin-Kun Wu
• Format: Others
• Language: en_US
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/85362438484655574792

碩士 === 國立交通大學 === 電信研究所 === 83 === Interstitial microwave antenna-array hyperthermia system for the treatment of superficial and deep-seated tumors has been investigated in recent years. A critical parameter in the hyperthermia system is the SAR (specific absorption rate) pattern, which gives information about the energy absorption in the tumor and surrounding tissue. In this thesis, we first present the SAR distribution produced by a simple Insulated Dipole Antenna (IDA), and then the Ez-field pattern of the IDA measured using an E-field probe. Finally we construct a phase and power level adjustable four-channel hyperthermia system operating at 915 MHz. In addition, a gradient-search adaptive control algorithm for shifting hot spot or null spot to any point is developed. Some static testing of optimal SAR pattern by applying the algorithm is performed.