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Journal of Biomedical Optics • Open Access

Using graphics processing units to accelerate perturbation Monte Carlo simulation in a turbid medium
Author(s): Fuhong Cai; Sailing He

Paper Abstract

We report a fast perturbation Monte Carlo (PMC) algorithm accelerated by graphics processing units (GPU). The two-step PMC simulation [Opt. Lett. 36, 2095 (2011)] is performed by storing the seeds instead of the photon's trajectory, and thus the requirement in computer random-access memory (RAM) becomes minimal. The two-step PMC is extremely suitable for implementation onto GPU. In a standard simulation of spatially-resolved photon migration in the turbid media, the acceleration ratio between using GPU and using conventional CPU is about 1000. Furthermore, since in the two-step PMC algorithm one records the effective seeds, which is associated to the photon that reaches a region of interest in this letter, and then re-run the MC simulation based on the recorded effective seeds, radiative transfer equation (RTE) can be solved by two-step PMC not only with an arbitrary change in the absorption coefficient, but also with large change in the scattering coefficient.

Paper Details

Date Published: 6 April 2012
PDF: 4 pages
J. Biomed. Opt. 17(4) 040502 doi: 10.1117/1.JBO.17.4.040502
Published in: Journal of Biomedical Optics Volume 17, Issue 4
Show Author Affiliations
Fuhong Cai, Zhejiang Univ. (China)
Sailing He, Zhejiang Univ. (China)

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