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基于GPU的快速调强算法研究 被引量:2

A Fast Implementation of IMRT Algorithm by the GPU
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摘要 研究了使用图形处理器(GPU)对调强放射治疗计划系统(IMRT)中分子动力学优化方法的加速方法及效果。利用统一计算设备构架(CUDA)平台,分别对4个临床肿瘤调强病例的笔束剂量响应矩阵的乘积运算进行GPU并行优化加速。比较和分析GPU并行加速笔束剂量响应矩阵的乘积运算的结果。结果表明,GPU平台上的计算结果与CPU平台的计算结果存在一定的差异,其最大相对误差为5.822×10^(-7),这一差异在临床上是可以接受的,GPU并行运算可以使计算速度提升9-12倍。 In this paper, we study the speedup effect when graphics processing unit (GPU) is used in intensity modulated radiation therapy (IMRT). The pencil-beam-dose-response matrix multiplication calculation in optimization process is implemented in compute unified device architecture (CUDA) running on the GPU, and C running on the CPU. The speedup factors are compared and analyzed. Test results show that the maximum relative error of 5.822×10^-7 can be found between the CPU results and GPU results, such discrepancy level is acceptable clinically, and the speedup factors reach 9-12 by using GPU.
出处 《核技术》 CAS CSCD 北大核心 2012年第4期297-300,共4页 Nuclear Techniques
基金 国家科技支撑计划项目(2011BAI12B05)资助 四川大学辐射物理及技术教育部重点实验室开放课题的资助
关键词 图形处理器(GPU) 统一计算设备构架(CUDA) 调强放射治疗(IMRT) GPU, CUDA, IMRT(intensity modulated radiation therapy)
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