Résumé
The temperature dependence of relative permittivity and conductivity of
Sujets)
Animaux , Conductivité électrique , Hyperthermie provoquée , Foie , Poumon , Suidae , TempératureRésumé
The effect of relaxation time in hyperbolic heat transfer model on the temperature field of microwave ablation of atrial fibrillation was investigated. And the results were compared with those calculated by Pennes model. A three-dimensional model of microwave ablation of atrial fibrillation was constructed. The relaxation time (
Sujets)
Humains , Fibrillation auriculaire/chirurgie , Ablation par cathéter , Température élevée , Micro-ondes , Ablation par radiofréquence , TempératureRésumé
OBJECTIVE: To study some thermal problems in invasive microwave coagulation (IMC) therapy. METHODS: Temperature fields predicts, limitation and remedy methods of the Pennes bioheat transfer equation during the temperature distribution analyses and how to kill a large anomalistic tumor for only once were discussed. RESULTS: The coagulation area between the simulations and actual measured results showed good correspondence. Blood flow influenced the rise in temperature significantly. CONCLUSIONS: Thermal distribution with computer simulation in invasive microwave coagulation therapy is an accurate and reliable method.