中文摘要：

目的运用有限元方法模拟颅内温控射频消融过程中的温度场分布，建立临床常用的激励模型，以提高射频消融治疗颅内病灶的效果。方法基于2种激励分布来建立3种有限元模型，并对其温度变化、热损伤范围进行对比分析。结果消融区域在消融开始60s内增长迅速，60s后增长缓慢，且固态介质模型的消融面积〉相应液态模的消融面积。结论恒温激励源的设计可用于模拟温控射频消融治疗。

英文摘要：

Objective This paper introduces finite element application of themerature-controlled radio frequency ablation（RFA） to simulate the temperature distribution of intracranial lesion and build the excitation models found in clinical practice, thus to improve the treatment effectiveness. Methods Three finite element models with two different exitations were first built, and then the key parameters including temperatures range and thermal injury were compared. Results The ablation regions grew fast in the first 60 seconds, then it became slow. In addition, the ablation regions of solid medium models were much larger than those of liquid models. Conclusion The design of homeothermal excitation may be effective for simulating temperature-controlled radio frequency abltion.