摘要
设计了一种工作在2450MHz频率的介入式微波热疗挽袖伞形天线。采用有限元数值分析方法,模拟计算了挽袖天线和挽袖伞形天线介入下肿瘤组织的比吸收率(SAR),并比较了挽袖伞形天线和挽袖天线的S11。将研制的介入式天线对仿生分层体模加热,采用红外热成像仪测温,给出天线在体模中的3维温度场和介入层体模的温度分布。研究结果表明,设计的挽袖伞形天线的温度场分布比挽袖天线均匀,符合实际临床热疗的要求。
A new 2450MHz invasive antenna for microwave hyperthermia is designed in this paper.The finite element method is employed to simulate the choke antenna and improved choke antenna i.e.choke-umbrella antenna.The specific absorption rates（SAR） in tumors are calculated with the two kinds of antennas.S11 of choke-umbrella antenna is also compared with that of choke antenna.Multi-layered block of tissue-equivalent phantom is heated with the fabricated invasive antenna.The distribution of the temperature field in the invasive layer as well as the three-dimensional distribution of the temperature field in phantom is obtained with an infrared thermo graphic technique.Research results show that the improved choke-umbrella antenna can generate more uniform temperature distribution and meets the requirements of the actual clinical microwave hyperthermia better.
出处
《中国医疗器械杂志》
CAS
2010年第6期427-430,共4页
Chinese Journal of Medical Instrumentation
基金
江苏省高校自然科学基础研究项目(08KJB510019)
关键词
微波热疗
介入式天线
比吸收率
microwave hyperthermia
invasive antenna
specific absorption rate（SAR）
