摘要
微波热疗的关键是实现微波能量长时间较均匀加热肿瘤组织。采用连续加热方法,在不改变天线结构及插入位置的条件下,很难实现对治疗区域的长时间均匀加热。我们结合电磁场的时域有限差分(FiniteDifferenceTimeDomain,FDTD)和温度场的有限差分方法模拟微波热疗天线在生物组织中产生的温度分布,通过调整天线的加热功率,并采用分时间隔加热的治疗方法,实现了微波能量对一定区域组织的长时间较均匀加热。
The basic objective of microwave hyperthermia is to raise the temperature in the tumor tissue without overheating point for a long time. It＇s difficult to achieve uniform temperature distribution using the continuous heating without changing the antenna shape and inserting position. In this paper, the interstitial antenna worked in the frequency of 2 450 MHz inserted into an infinite muscle model is studied. The Finite Difference Time Domoin（FDTD） method was used to calculate the electromagnetic field, while the finite difference method （FDM） was used to analyze the temperature distribution in tumor tissue. The simulation results show that the long-time evenly heating can be achieved by using the alternately heating process and the treatment area can be changed by adjusting input power.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2006年第6期1339-1342,共4页
Journal of Biomedical Engineering
基金
陕西省教育厅自然科学基金资助项目(03JK086)
关键词
微波热疗
时域有限差分
温度分布
Microwave thermotherapy Finite Difference Time Domain （FDTD） Temperature distribution
