J Shanghai Jiaotong Univ Sci ›› 2023, Vol. 28 ›› Issue (4): 411-.doi: 10.1007/s12204-022-2481-y

• • 上一篇    



  1. (上海交通大学 生物医学工程学院,上海200240)
  • 收稿日期:2021-03-17 接受日期:2021-06-07 出版日期:2023-07-28 发布日期:2023-07-31

Real-Time Calculation Method for Temperature Distribution of Temperature-Controlled Radiofrequency Ablation

WANG Xuewei (王雪维),WANG Yifei (王逸飞),ZHANG Aili* (张爱丽)   

  1. (School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
  • Received:2021-03-17 Accepted:2021-06-07 Online:2023-07-28 Published:2023-07-31

摘要: 精确的温度控制和温度场预测对射频消融具有重要意义,本研究提出了一种比例-积分温度控制射频消融过程中的温度场实时计算方法,基于电导率对温控射频消融影响的研究,将热电耦合的计算关系转换为线性的计算关系,使计算效率提升了150倍。对于10 min的射频消融,计算时间约为23 s,计算结果和相同情况下的COMSOL Multiphysics相比不超过1 ℃。本研究中该计算方法不仅被用于单针射频消融,还被用于双针射频消融中温度场的计算。

关键词: 射频消融,温度场分布,比例-积分控制

Abstract: Precise temperature control and temperature distribution prediction are of great significance forradiofrequency ablation. This research proposes a real-time calculation method for the temperature distribution of radiofrequency ablation combined with proportional-integral temperature control. The thermo-electricalcoupling was simplified into a linear relationship based on the study of the influence of temperature-dependentelectrical conductivity and thermal conductivity on the PI-controlled radiofrequency ablation temperature distribution, which increases the computational efficiency by 150 times. The average calculation time for radiofrequencyablation of 10 min is about 23 s, and the difference between the calculation results of this method and that fromCOMSOL Multiphysics is no more than 1 ?C. This method is not only used for single-probe, but also for doubleprobe radiofrequency ablation in this paper.

Key words: radiofrequency ablation, temperature distribution, proportional-integral (PI) controller