Dosimetric analysis of magnetic fields impact on 192Ir MicroSelectron-HDR and BEBIG 60Co-HDR brachytherapy sources: A Monte Carlo simulation study using GATE

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-04-12 DOI:10.1016/j.radphyschem.2025.112814

Pooya Alvani , Saman Dalvand , Mansour Zabihzadeh

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Abstract

This study investigates the dosimetric impact of magnetic fields (MFs) on ¹⁹²Ir MicroSelectron-HDR and BEBIG ⁶⁰Co HDR brachytherapy sources. Monte Carlo simulations using the GATE toolkit were conducted to evaluate dosimetric parameters, including radial dose function (g(r)) and anisotropy function (F(r, θ)), as well as dose distributions under MF strengths of 1.5T and 3T across different orientations. The results show that ¹⁹²Ir MicroSelectron-HDR exhibits minimal perturbations in dosimetric parameters, with deviations consistently below 1 %, making it a robust option for MRI-guided brachytherapy. Conversely, ⁶⁰Co sources demonstrate significant dose distortions, with up to 27 % dose enhancement near the source and notable anisotropic effects under MF influence, necessitating MF-specific corrections in treatment planning systems. The results underscore the importance of incorporating MF-induced effects into clinical workflows for MRI-guided brachytherapy, particularly for ⁶⁰Co sources.

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.