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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 8 — Aug. 26, 2011

Graphics processing unit parallel accelerated solution of the discrete ordinates for photon transport in biological tissues

Kuan Peng, Xinbo Gao, Xiaochao Qu, Nunu Ren, Xueli Chen, Xiaowei He, Xiaorei Wang, Jimin Liang, and Jie Tian  »View Author Affiliations


Applied Optics, Vol. 50, Issue 21, pp. 3808-3823 (2011)
http://dx.doi.org/10.1364/AO.50.003808


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Abstract

As a widely used numerical solution for the radiation transport equation (RTE), the discrete ordinates can predict the propagation of photons through biological tissues more accurately relative to the diffusion equation. The discrete ordinates reduce the RTE to a serial of differential equations that can be solved by source iteration (SI). However, the tremendous time consumption of SI, which is partly caused by the expensive computation of each SI step, limits its applications. In this paper, we present a graphics processing unit (GPU) parallel accelerated SI method for discrete ordinates. Utilizing the calculation independence on the levels of the discrete ordinate equation and spatial element, the proposed method reduces the time cost of each SI step by parallel calculation. The photon reflection at the boundary was calculated based on the results of the last SI step to ensure the calculation independence on the level of the discrete ordinate equation. An element sweeping strategy was proposed to detect the calculation independence on the level of the spatial element. A GPU parallel frame called the compute unified device architecture was employed to carry out the parallel computation. The simulation experiments, which were carried out with a cylindrical phantom and numerical mouse, indicated that the time cost of each SI step can be reduced up to a factor of 228 by the proposed method with a GTX 260 graphics card.

© 2011 Optical Society of America

OCIS Codes
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(170.6960) Medical optics and biotechnology : Tomography
(230.6080) Optical devices : Sources

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: April 4, 2011
Revised Manuscript: May 5, 2011
Manuscript Accepted: June 2, 2011
Published: July 11, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Kuan Peng, Xinbo Gao, Xiaochao Qu, Nunu Ren, Xueli Chen, Xiaowei He, Xiaorei Wang, Jimin Liang, and Jie Tian, "Graphics processing unit parallel accelerated solution of the discrete ordinates for photon transport in biological tissues," Appl. Opt. 50, 3808-3823 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-50-21-3808

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