A temperature field simulation method for microwave thermal ablation based on characteristic parameter feedback

Abstract

The invention discloses a microwave thermal ablation temperature field simulation method based on characteristic parameter feedback, comprising: setting preset initial conditions and boundary conditions in COMSOL Multiphysics software, establishing a microwave thermal ablation temperature field simulation model; Conduct sensitivity analysis of characteristic parameters; perform microwave thermal ablation experiments, and use temperature measurement to measure seven points in the ablation zone to obtain measured temperatures; based on parameter sensitivity analysis results, use feedback pin measured data to obtain accurate representation of characteristic parameters; The temperature field simulation is carried out by using the accurate representation of the characteristic parameters, and compared with the measured data to verify the accuracy of the temperature field distribution model. The technical solution of the present invention solves the problem in the prior art that the temperature field distribution cannot be accurately obtained due to the uncertainty of tissue characteristic parameters.

Description

Technical field [0001] The present invention belongs to the field of thermal meation temperature field simulation technology, and more particularly to a microwave thermal ablation temperature field simulation method based on characteristic parameter feedback. Background technique [0002] Liver tumors are one of the biggest threats in human life. In China, there is a second killer that caused death in China, so effective treatment of liver tumors has become a social problem to be solved. The microwave heat ablation technology has been widely used in the clinic due to the advantages of minimally invasive, therapeutic effect. It has become an effective way to treat human liver tumors, but the quality of thermal ablation still depends mainly on the experience of clinicians, lacks objective in accordance with. In clinical surgery, the thermal coagulation zone of the liver tumor often uses 54 ° C as a boundary threshold. Therefore, precise characterization of thermal melt temperature ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the temperature field distribution cannot be accurately obtained due to the uncertainty of tissue characteristic parameters, the present invention proposes a microwave thermal ablation temperature field simulation method based on characteristic parameter feedback, through parameter sensitivity analysis and single Accurate characterization of tissue characteristic parameters is obtained based on actual measurement feedback, and then an accurate temperature field model for constant power microwave thermal ablation is obtained through simulation technology

Images