Modeling a conical applicator for high intensity focused ultrasound with the finite element method

D. A. Hernandez, V. Contreras, L. Leija, A. Vera, D. Martínez-Fong, M. Gutiérrez
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引用次数: 3

Abstract

The high-intensity focused ultrasound (HIFU) has shown positive results in the treatment of prostate cancer and its possible application in neurodegenerative diseases. This paper describes the design of a HIFU applicator with a conical geometry, for modeling the software COMSOL® (COMSOL Inc., Burlington, MA) was used, which bases its operation on the finite element method (FEM). The equations that govern the phenomenon were used to optimize the dimensions of the applicator and their use in the application surface. The design condition to be met is that the applicator should not alter the focus and acoustic field generated by the transducer source of ultrasound. The designed model allows that the system does not depend on a water container for the application of HIFU, reducing the dimensions and facilitating interaction with the system. It was obtained a design where the conical applicator has a radius at the apex of 5.2 mm, a radius at the base of 11.5 mm, a thickness of 2 mm walls, an operating frequency of 2 MHz and a focus of 20 mm operation. Water was considered as a means of propagation between the application surface and the applicator.
用有限元法对高强度聚焦超声锥形应用器进行建模
高强度聚焦超声(HIFU)在前列腺癌的治疗中显示出积极的效果,并可能在神经退行性疾病中应用。本文描述了一种具有锥形几何形状的HIFU涂抹器的设计,用于建模软件COMSOL®(COMSOL Inc., Burlington, MA),该软件基于有限元法(FEM)进行操作。控制这一现象的方程被用来优化涂敷器的尺寸及其在涂敷表面的使用。要满足的设计条件是,施药器不应改变超声换能器源产生的焦点和声场。设计的模型允许系统不依赖于水容器来应用HIFU,减少了尺寸并促进了与系统的交互。结果表明,锥形涂敷器的尖端半径为5.2 mm,底部半径为11.5 mm,壁厚为2mm,工作频率为2mhz,焦点为20 mm。水被认为是在施用表面和施用器之间传播的手段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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