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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 13 — May. 1, 2014
  • pp: 2754–2765

Full domain-decomposition scheme for diffuse optical tomography of large-sized tissues with a combined CPU and GPU parallelization

Xi Yi, Xin Wang, Weiting Chen, Wenbo Wan, Huijuan Zhao, and Feng Gao  »View Author Affiliations


Applied Optics, Vol. 53, Issue 13, pp. 2754-2765 (2014)
http://dx.doi.org/10.1364/AO.53.002754


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Abstract

The common approach to diffuse optical tomography is to solve a nonlinear and ill-posed inverse problem using a linearized iteration process that involves repeated use of the forward and inverse solvers on an appropriately discretized domain of interest. This scheme normally brings severe computation and storage burdens to its applications on large-sized tissues, such as breast tumor diagnosis and brain functional imaging, and prevents from using the matrix-fashioned linear inversions for improved image quality. To cope with the difficulties, we propose in this paper a parallelized full domain-decomposition scheme, which divides the whole domain into several overlapped subdomains and solves the corresponding subinversions independently within the framework of the Schwarz-type iterations, with the support of a combined multicore CPU and multithread graphics processing unit (GPU) parallelization strategy. The numerical and phantom experiments both demonstrate that the proposed method can effectively reduce the computation time and memory occupation for the large-sized problem and improve the quantitative performance of the reconstruction.

© 2014 Optical Society of America

OCIS Codes
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.6900) Medical optics and biotechnology : Three-dimensional microscopy
(170.6960) Medical optics and biotechnology : Tomography
(200.4960) Optics in computing : Parallel processing

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: January 10, 2014
Revised Manuscript: March 11, 2014
Manuscript Accepted: March 16, 2014
Published: April 21, 2014

Virtual Issues
Vol. 9, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Xi Yi, Xin Wang, Weiting Chen, Wenbo Wan, Huijuan Zhao, and Feng Gao, "Full domain-decomposition scheme for diffuse optical tomography of large-sized tissues with a combined CPU and GPU parallelization," Appl. Opt. 53, 2754-2765 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-13-2754


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