GPU-based fast pencil beam algorithm for proton therapy
GPU-based fast pencil beam algorithm for proton therapy
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DOI：
10.1088/0031-9155/56/5/006
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发表时间：
2011-03-07
影响因子：
3.5
通讯作者：
Nagamine, Yoshihiko
中科院分区：
文献类型：
--
作者：
Fujimoto, Rintaro;Kurihara, Tsuneya;Nagamine, Yoshihiko
治疗计划系统的性能是制定复杂计划的重要因素。剂量计算是计划操作中的主要耗时过程。用于质子剂量计算的标准算法是笔形射束算法，其产生相对准确的结果，但耗时。为了缩短计算时间，我们开发了一种基于GPU（图形处理器）的笔形波束算法。我们已经实现了这种算法，并计算剂量分布的情况下，水幻影。结果进行了比较，通过传统的方法获得的计算时间和两种方法之间的差异。与Intel Core-i7 920处理器相比，使用NVIDIA GeForce GTX 480卡时，新算法的性能提高了5-20倍。剂量分布的最大偏差在0.2%以内。我们的结果表明，GPU是有效的质子剂量计算。
Performance of a treatment planning system is an essential factor in making sophisticated plans. The dose calculation is a major time-consuming process in planning operations. The standard algorithm for proton dose calculations is the pencil beam algorithm which produces relatively accurate results, but is time consuming. In order to shorten the computational time, we have developed a GPU (graphics processing unit)-based pencil beam algorithm. We have implemented this algorithm and calculated dose distributions in the case of a water phantom. The results were compared to those obtained by a traditional method with respect to the computational time and discrepancy between the two methods. The new algorithm shows 5-20 times faster performance using the NVIDIA GeForce GTX 480 card in comparison with the Intel Core-i7 920 processor. The maximum discrepancy of the dose distribution is within 0.2%. Our results show that GPUs are effective for proton dose calculations.