NDLI: Parallel OSEM Reconstruction Algorithm for Fully 3-D SPECT on a Beowulf Cluster

Content Provider	IEEE Xplore Digital Library
Author	Zhou Rong Ma Tianyu Jin Yongjie
Copyright Year	2005
Description	Author affiliation: Dept. of Eng. Phys., Tsinghua Univ., Beijing (Zhou Rong; Ma Tianyu; Jin Yongjie)
Abstract	In order to improve the computation speed of ordered subset expectation maximization (OSEM) algorithm for fully 3-D single photon emission computed tomography (SPECT) reconstruction, an experimental beowulf-type cluster was built and several parallel reconstruction schemes were described. We implemented a single-program-multiple-data (SPMD) parallel 3-D OSEM reconstruction algorithm based on message passing interface (MPI) and tested it with combinations of different number of calculating processors and different size of voxel grid in reconstruction (64 times 64 times 64 and 128 times 128 times 128). Performance of parallelization was evaluated in terms of the speedup factor and parallel efficiency. This parallel implementation methodology is expected to be helpful to make fully 3-D OSEM algorithms more feasible in clinical SPECT studies
Starting Page	1834
Ending Page	1837
File Size	202712
Page Count	4
File Format	PDF
ISBN	0780387414
DOI	10.1109/IEMBS.2005.1616806
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-17
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reconstruction algorithms Image reconstruction Concurrent computing Single photon emission computed tomography Iterative algorithms Positron emission tomography Clustering algorithms Attenuation Electromagnetic scattering Particle scattering
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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