CELIA Centre des Lasers Intenses et Applications, Talence, France; CRLCC Institut Bergonié, Radiotherapy, Bordeaux, France.
CELIA Centre des Lasers Intenses et Applications, Talence, France; CRLCC Institut Bergonié, Radiotherapy, Bordeaux, France.
Phys Med. 2017 Oct;42:313-318. doi: 10.1016/j.ejmp.2017.06.007. Epub 2017 Jul 1.
One of the big challenges of the emerging MRI-guided radiotherapy is the prediction of an external magnetic field effect on the deposited dose induced by a beam of charged particles. In this paper, we present the results of the implementation of the Lorentz force in the deterministic M1 model. The validation of our code is performed by comparisons with the Monte-Carlo code FLUKA. The relevant examples show a significant modification of the shape of dose deposition volume induced by the external magnetic field in presence of heterogeneities. A gamma-index analysis 3%/3mm shows a good agreement of our model with FLUKA simulations.
新兴的磁共振引导放射治疗的一个主要挑战是预测带电粒子束产生的外磁场对沉积剂量的影响。在本文中，我们介绍了在确定性 M1 模型中实现洛伦兹力的结果。通过与蒙特卡罗代码 FLUKA 的比较来验证我们的代码。相关示例表明，在外磁场存在不均匀性的情况下，沉积剂量体积的形状会发生显著改变。伽马指数分析 3%/3mm 表明我们的模型与 FLUKA 模拟具有良好的一致性。
