Accelerating mesh-based Monte Carlo method on modern CPU architectures

作者：Fang Qianqian^*; Kaeli David R

来源：Biomedical Optics Express, 2012, 3(12): 3223.

DOI：10.1364/boe.3.003223

In this report, we discuss the use of contemporary ray-tracing techniques to accelerate 3D mesh-based Monte Carlo photon transport simulations. Single Instruction Multiple Data (SIMD) based computation and branch-less design are exploited to accelerate ray-tetrahedron intersection tests and yield a 2-fold speed-up for ray-tracing calculations on a multi-core CPU. As part of this work, we have also studied SIMD-accelerated random number generators and math functions. The combination of these techniques achieved an overall improvement of 22% in simulation speed as compared to using a non-SIMD implementation. We applied this new method to analyze a complex numerical phantom and both the phantom data and the improved code are available as open-source software at http://mcx.sourceforge.net/mmc/.

• 出版日期2012-12-1
• 单位东北大学