Kanematsu Nobuyuki, Akagi Takashi, Takatani Yasuyuki, Yonai Shunsuke, Sakamoto Hidenobu, Yamashita Haruo
National Institute of Radiological Sciences, 4-9-1 Anagawa, Chiba 263-8555, Japan.
Phys Med Biol. 2006 Oct 7;51(19):4807-17. doi: 10.1088/0031-9155/51/19/006. Epub 2006 Sep 8.
We have developed a simple collimator model to improve the accuracy of penumbra behaviour in pencil-beam dose calculation for proton radiotherapy. In this model, transmission of particles through a three-dimensionally extended opening of a collimator is calculated in conjunction with phase-space distribution of the particles. Comparison of the dose distributions calculated using the new three-dimensional collimator model and the conventional two-dimensional model to lateral dose profiles experimentally measured with collimated proton beams showed the superiority of the new model over the conventional one.
我们开发了一种简单的准直器模型，以提高质子放射治疗笔形束剂量计算中半影行为的准确性。在该模型中，结合粒子的相空间分布来计算粒子通过准直器三维扩展开口的传输。将使用新的三维准直器模型和传统二维模型计算的剂量分布与用准直质子束实验测量的侧向剂量分布进行比较，结果表明新模型优于传统模型。
