热疗用微波辐射器长度对其性能影响的理论分析  

The Theoretical Analysis of the Influence of the Length of Microwave Hyperthermia Applicators on Its characteristics

作　　者：王世杰[1] 何平[1] 张立儒[1] 向婉成[1] 隋修武 

机构地区：[1]天津大学自动化系,天津300072

出　　处：《微波学报》1996年第4期281-287,295,共8页Journal of Microwaves

摘　　要：本文分析了一种带冷却水的用于人体体腔内部热疗的绝缘偶极子微波辐射器的特性.利用辐射器上的电流分布导出辐射阻抗和驻波比与辐射器长度的关系式,探讨了体腔周围被加热生物组织中分布的比吸收率(SAR),进而根据热平衡方程得到辐射器长度对温度场分布的影响,为体腔内部热疗用微波辐射器的设计提供了理论依据.An insulated water-cooled dipole microwave applicator for intracavitary hyperthermia is analysed. The influence of the applicator' s length to the radiation ampedance and standing wave ratio is discussed according to the current distribution on the applicator. Then, the SAR in the biological tissue around the cavity is calculated. Finally, the influence of the applicator' s length on the temperature field distribution is studied in conformity with the steady state bioheat equilibrium equation. It provides the theoretical base for the design of intracavitary microwave hyperthermia applicator.

关 键 词：体腔内 热疗 微波辐射器 温度场分布 

分 类 号：R454.1[医药卫生—治疗学]