Kumaradas J C, Sherar M D
Department of Medical Biophysics, University of Toronto and the Ontario Cancer Institute/Princess Margaret Hospital, Toronto, Ontario, Canada.
Int J Hyperthermia. 2002 Sep-Oct;18(5):426-40. doi: 10.1080/02656730210139591.
Hyperthermia has been shown to improve local tumour control of superficial and deep seated lesions when combined with radiotherapy. There remains difficulty in heating larger tumours with conventional applicators, but this is being addressed by several new applicator designs. This paper presents a new numerical model of microwave heating which is designed to aid in the development of new applicators for superficial heating. The model is based on a finite element method which utilises vector valued basis functions instead of the more conventional scalar valued basis functions. These basis functions were chosen since they are inherently suited for the solution of Maxwell's equations due to their vector nature. The model was successfully verified against an analytic solution to the Mie scattering problem as well as against previously published measurements of heating from a modified water bolus attached to a conventional waveguide applicator. An accompanying paper describes an application of this model to the design optimization of this modified bolus.
研究表明，热疗与放射治疗联合使用时，可改善浅表和深部病变的局部肿瘤控制。使用传统的施源器加热较大肿瘤仍存在困难，但一些新的施源器设计正在解决这一问题。本文提出了一种新的微波加热数值模型，旨在帮助开发用于浅表加热的新型施源器。该模型基于有限元方法，该方法使用矢量值基函数而非更传统的标量值基函数。选择这些基函数是因为它们的矢量性质使其天生适合求解麦克斯韦方程组。该模型已成功通过米氏散射问题的解析解以及先前发表的关于连接到传统波导施源器的改良水囊加热测量结果进行了验证。随附的一篇论文描述了该模型在这种改良水囊设计优化中的应用。
