Enhancing the properties of beam forming bolus in hyperthermia: numerical simulation and empirical verification

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• 作者：Seyed Ali Aghayan ; Dariush Sardari…
• 关键词：Absorbing bolus ; Beam forming ; Hyperthermia ; SAR ; Simulation ; Temperature ; Therapeutic area
• 刊名：Australasian Physical & Engineering Sciences in Medicine
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：37
• 期：4
• 页码：691-703
• 全文大小：1,689 KB
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• 作者单位：Seyed Ali Aghayan (1)
  Dariush Sardari (1)
  Seied Rabi Mehdi Mahdavi (2)
  Maryam Mohammadi (3)
  
  1. Department of Engineering, Science and Research Branch, Islamic Azad University, 14155-775, Tehran, 14778 93855, Islamic Republic of Iran
  2. Department of Medical Physics, Tehran University of Medical Science, Tehran, Islamic Republic of Iran
  3. Department of Physics, Shahrood Branch, Islamic Azad University, Shahrood, Iran
  
• 刊物主题：Biomedicine general; Biophysics and Biological Physics; Medical and Radiation Physics; Biomedical Engineering;
• 出版者：Springer Netherlands
• ISSN：1879-5447

文摘

In this paper we present a simulation study of the induced specific absorption rate (SAR) within the phantom produced by radiofrequency radiation from a 8?MHz capacitive applicator. The main focus of the current study is on demonstrating the beam shaping properties of the bolus system as well as its effect on controlling the therapeutic area. Different electrical conductivities and geometries of the bolus were considered in the simulation of induced SAR distributions in a muscle-equivalent model with uniform dielectric properties. To validate the presented model, we carried out a comparison between the SAR simulation results and the temperature measurements in an agar split-phantom and an excellent agreement was observed.