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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 2, Iss. 5 — May. 1, 2011
  • pp: 1258–1264

Comment on A study on tetrahedron-based inhomogeneous Monte-Carlo optical simulation”

Qianqian Fang  »View Author Affiliations

Biomedical Optics Express, Vol. 2, Issue 5, pp. 1258-1264 (2011)

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The Monte Carlo (MC) method is a popular approach to modeling photon propagation inside general turbid media, such as human tissue. Progress had been made in the past year with the independent proposals of two mesh-based Monte Carlo methods employing ray-tracing techniques. Both methods have shown improvements in accuracy and efficiency in modeling complex domains. A recent paper by Shen and Wang [Biomed. Opt. Express 2, 44 (2011)] reported preliminary results towards the cross-validation of the two mesh-based MC algorithms and software implementations, showing a 3–6 fold speed difference between the two software packages. In this comment, we share our views on unbiased software comparisons and discuss additional issues such as the use of pre-computed data, interpolation strategies, impact of compiler settings, use of Russian roulette, memory cost and potential pitfalls in measuring algorithm performance. Despite key differences between the two algorithms in handling of non-tetrahedral meshes, we found that they share similar structure and performance for tetrahedral meshes. A significant fraction of the observed speed differences in the mentioned article was the result of inconsistent use of compilers and libraries.

© 2011 OSA

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

Original Manuscript: December 13, 2010
Manuscript Accepted: December 29, 2010
Published: April 19, 2011

Qianqian Fang, "Comment on “A study on tetrahedron-based inhomogeneous Monte-Carlo optical simulation”," Biomed. Opt. Express 2, 1258-1264 (2011)

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