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3D Printing of Preclinical X-ray Computed Tomographic Data Sets
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在FLUKA中导入CAD网格格式模型的简单方法.

Sixue Dong1,2,3,4, Yinxiangzi Sheng4,5,6, Jiazhou Wang1,2,3,4

  • 1Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China.

Journal of applied clinical medical physics
|August 11, 2023
PubMed
概括

一个新的Python脚本简化了将CAD网格模型转换为FLUKA模拟的voxelized几何模型,确保粒子放射治疗的准确性. 这种方法提高了治疗规划的效率和精度.

关键词:
一个CAD网格模型的CAD网格模型.蒙特卡洛模拟的蒙特卡洛模拟几何转换转换的几何学这是一个 voxel 模型.

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科学领域:

  • 医学物理 医学物理
  • 计算物理 计算物理
  • 放射治疗模拟器 放射治疗模拟器

背景情况:

  • 蒙特卡洛 (MC) 代码FLUKA被广泛用于精确的粒子束放射疗法模拟.
  • 将计算机辅助设计 (CAD) 网格模型直接转换为FLUKA可读的几何形状是具有挑战性的.
  • 这种转换需要一种简化的方法.

研究的目的:

  • 开发和验证一个基于Python的脚本,用于voxelizingCAD网格文件.
  • 为了在FLUKA.中建立这些声音化几何模型 (VGMs).
  • 为了简化和提高FLUKA.中的几何模型创建的准确性.

主要方法:

  • 五个几何模型 (立方体,球体,圆,RGF,1D-RiFi) 被导出为stl文件.
  • 一个开源的 Python 脚本将 .stl 文件转换为 3D voxel 网格.
  • FLUKA和Flair用于构建VGM和直接几何模型 (DGM) 以进行比较.
  • 模拟了碳离子束,以比较剂量分布和积分剂量深度 (IDD).

主要成果:

  • VGM和CAD模型之间的体积差异小于0.6%.
  • 在IDD的最大平均点对点偏差为0.7%±0.51%.
  • 3D剂量马指数合格率超过97% (1%-1毫米标准).
  • VGM和DGM之间的CPU时间差异平均为2.89%±0.22%.

结论:

  • 一种基于Python的方法有效地将CAD网格文件转换为FLUKA的VGM.
  • 该方法简单,准确,适合用于放射治疗模拟.
  • 这种方法提高了FLUKA对复杂几何形状的可用性.