OPTIMIZATION OF DUAL SCATTERING FOIL FOR 6 TO 20 MeV ELECTRON BEAM RADIOTHERAPY
OPTIMIZATION OF DUAL SCATTERING FOIL FOR 6 TO 20 MeV ELECTRON BEAM RADIOTHERAPY
复制标题
用于 6 至 20 MeV 电子束放射治疗的双散射箔的优化
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Dhole
中科院分区：
文献类型：
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作者：
B. J. Patil;V. Bhoraskar;S. Dhole
近50年来，电子束治疗已成为一种重要的放射治疗方式。来自LINAC的电子束的尺寸为102 mm，而实际治疗所需的尺寸通常大于2 × 2 cm 2，在等中心处高达25 × 25 cm 2。在本工作中，它建议使用双散射箔系统用于产生临床电子束。6至20 MeV的电子箔进行了优化，使用Monte Carlo基于FLUKA代码。对材料成分、一次箔厚度、二次箔高斯宽度和高度进行了优化，使其满足等中心剂量、束流均匀性、韧致辐射混合等设计参数。总之，一次散射箔已优化为具有均匀厚度的高Z元件（Ta），而次级箔已经用具有高斯形状的低Z元素（Al）优化。
From last 50 years, electron beam therapy has an important radiation therapy modality. The electron beam from the LINAC is of size ∼ 2 mm, whereas the size required for actual treatment is usually larger than 2 × 2 cm 2 up to 25 × 25 cm 2 at the isocenter. In the present work, it is proposed to use dual scattering foil system for production of clinical electron beam. The foils for 6 to 20 MeV electrons were optimized using the Monte Carlo based FLUKA code. The material composition, thickness of primary foil, Gaussian width and height of secondary foil were optimized such that it should meet the design parameters such as dose at isocenter, beam uniformity, admixture of bremsstrahlung, etc. In conclusion, the primary scattering foil has been optimized with high Z element (Ta) having uniform thickness, whereas the secondary foil has been optimized with low Z element (Al) having Gaussian shape.