Affiliation:
1. Beijing University of Technology
Abstract
Purpose: The aim of this study is to contrast the coupling algorithm (CEE) and boundary heat exchange coefficients (Nu) used in treatment of the large blood vessel in thermal ablation. Methods: Based on the Pennes bioheat transfer equation, the models with blood vessel parallel to microwave antenna were built with finite element method. In two kind of simulation, blood flow rate was set in 0.2 m/s or boundary heat exchange coefficients was set in 1750 W / (m2 °C), respectively. Results and conclusions : There was no significant difference on shape of effective ablation areas and 54°C temperature contours by using two kinds of simulation methods, especially the place far away from the blood vessel. At the place near the blood vessel, the method of CEE is closer to real condition which considers directivity of blood. Whats more, there are higher temperature by using method of Nu inside effective ablation areas.
Publisher
Trans Tech Publications, Ltd.
Reference17 articles.
1. Fangyi Liu, Xiaoling Yu, Zhiyu Han, Yang Wang. Clinical application of ultrasound-guided percutaneous biopsy in mediastinal lesions. Chinese J Med Imaging Tech. 24. 9 (2008) 1459-1461.
2. Yanxia Kang, Helong Zhang. The research progress of tumor heat treatment mechanism. Journal of modern oncology. 16. 3 (2008) 473-475.
3. Haiming Ai, Shuicai Wu, Lei Zhao, Hongjian Gao, Yi Zeng. Key technologies and hot issues in microwave hyperthermia. Journal of clinical rehabilitative tissue engineering research. 13. 4 (2009) 731-734.
4. S. Labonte, H. Ali, L. Roy, Monopoles for microwave catheter ablation of heart tissue, IEEE MTT SYMP. Dig. 1 (1995) 303-306.
5. Langberg J, Chin M. Ablation of atrioventricular junction using radiofrequency energy using a new electrode catheter. Amer. J. Cardiol. 67. 2 (1991) 142-147.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献