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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 12 — Dec. 1, 2012
  • pp: 3223–3230

Accelerating mesh-based Monte Carlo method on modern CPU architectures

Qianqian Fang and David R. Kaeli  »View Author Affiliations


Biomedical Optics Express, Vol. 3, Issue 12, pp. 3223-3230 (2012)
http://dx.doi.org/10.1364/BOE.3.003223


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Abstract

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/.

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.5280) Medical optics and biotechnology : Photon migration
(170.7050) Medical optics and biotechnology : Turbid media

ToC Category:
Optics of Tissue and Turbid Media

History
Original Manuscript: July 23, 2012
Revised Manuscript: September 25, 2012
Manuscript Accepted: September 27, 2012
Published: November 12, 2012

Citation
Qianqian Fang and David R. Kaeli, "Accelerating mesh-based Monte Carlo method on modern CPU architectures," Biomed. Opt. Express 3, 3223-3230 (2012)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-3-12-3223


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