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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Estimation of dose and light distributions in water during irradiation of muon beams
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Estimation of dose and light distributions in water during irradiation of muon beams

机译：μ子梁照射期间水中剂量和光分布的估算

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摘要

High-intensity muon beams are now available at the Japan Proton Accelerator Research Complex and their use in radiotherapy may become possible in the future. Dose and range estimation are therefore important and optical imaging of the dose or range may be a promising method for that purpose. We calculated the dose and light distributions in water during irradiation of a positive muon beam using Monte Carlo simulation. First, we simulated the dose deposited in water for pencil beams with 30 and 50 MeV positive muons. We were able to clearly identify the Bragg peak in the depth dose profiles by muons and observed that the dose from positrons are added to the Bragg peak area with a similar to 10% muon dose. We also found that the lateral dose widths increased as the depth increased and that it was similar to 3-5 times wider at the Bragg peak position. With the light distribution of the muon in water, light produced by the positrons was dominant and distributed around the Bragg peak, and the peak positions were estimated within 2 mm differences of the peak position of the dose distributions. It is therefore possible to monitor the Bragg peak position of muons using an optical method.
机译：现在可以在日本质子加速器研究复合体提供高强度μON梁，并在未来可能在放疗中使用。因此，剂量和范围估计是重要的，并且剂量或范围的光学成像可以是用于此目的的有希望的方法。我们在蒙特卡罗模拟中计算了在正μ子束照射期间水中的剂量和光分布。首先，我们模拟沉积在水中的剂量，用于铅笔梁，具有30和50mev阳性μON。我们能够通过μONs清楚地识别深度剂量曲线中的布拉格峰，并观察到来自正态的剂量以类似于10％的μ子剂量的曲折峰面积。我们还发现，随着深度的增加，横向剂量宽度增加，并且在布拉格峰位置达到3-5倍。随着μ子在水中的光分布，通过正弦产生的光优势并分布在布拉格峰周围，并且峰位置估计在剂量分布的峰位置的2mm差异内。因此，可以使用光学方法监测μON的布拉格峰值位置。

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