Design of Chock-vault Antenna for Injurious Interventional Thermotherapy / 航天医学与医学工程

ABSTRACT

Objective To design a chock-vault antenna for injurious interventional thermotherapy and to evaluate antenna performance change when structure parameters of the antenna are adjusted. Methods Finite element method was used to simulate the distributions of the reflection coefficient and the specific absorption rate (SAR) of the chock-vault antenna of different structure parameters for microwave thermotherapy human muscle tissue model when it worked at 2 450 MHz. The chock-vault antenna for injurious interventional thermotherapy had been optimized. Results This antenna was made.And the reflection coefficient and SAR were measured with human muscle tissue model experiment. The simulation results were validated. Conclusion The SAR distribution of the improved choke-vault antenna does not depend on depth of the insertion tissue. The reflection coefficient can be reduced greatly. The top energy distribution is reasonable.