title: [Fast gamma index calculation method in dose distribution comparison].
abstract: As a method of dosimetric verification in radiotherapy, gamma index has been widely used for evaluating dose distribution in research and clinical cases. However, for three-dimensional dose distributions, gamma index calculation is very time consuming for the computers. In this paper, based on a pre-sorting technique, we implement a parallel computing algorithm of gamma index on graphic processing unit (GPU). Dose comparisons are performed for seven cases to test our new implementation. It was shown that the GPU-based gamma index calculations achieved a speedup of ten-folds in comparison with corresponding CPU implementation without losing accuracy. The result showed that utilizing GPU parallel computing to speed up gamma index calculations could be reliable and efficient in the implementation.
authors: Key Laboratory of Radiation Physics and Technology, Ministry of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China.
authors: Lele
authors: L
authors: Liu
authors: Chengjun
authors: C
authors: Gou
authors: Zhangwen
authors: Z
authors: Wu
authors: Qing
authors: Q
authors: Hou
mesh_terms: D000465:Algorithms; D003196:Computer Graphics; D006801:Humans; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D012984:Software