Mapping Iterative Medical Imaging Algorithm on Cell Accelerator

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dc.contributor.authorXu, Meilian
dc.contributor.authorThulasiraman, Parimala
dc.date.accessioned2015-05-14T16:43:57Z
dc.date.available2015-05-14T16:43:57Z
dc.date.issued2011-9-11
dc.date.updated2015-03-29T13:37:10Z
dc.description.abstractAlgebraic reconstruction techniques require about half the number of projections as that of Fourier backprojection methods, which makes these methods safer in terms of required radiation dose. Algebraic reconstruction technique (ART) and its variant OS-SART (ordered subset simultaneous ART) are techniques that provide faster convergence with comparatively good image quality. However, the prohibitively long processing time of these techniques prevents their adoption in commercial CT machines. Parallel computing is one solution to this problem. With the advent of heterogeneous multicore architectures that exploit data parallel applications, medical imaging algorithms such as OS-SART can be studied to produce increased performance. In this paper, we map OS-SART on cell broadband engine (Cell BE). We effectively use the architectural features of Cell BE to provide an efficient mapping. The Cell BE consists of one powerPC processor element (PPE) and eight SIMD coprocessors known as synergetic processor elements (SPEs). The limited memory storage on each of the SPEs makes the mapping challenging. Therefore, we present optimization techniques to efficiently map the algorithm on the Cell BE for improved performance over CPU version. We compare the performance of our proposed algorithm on Cell BE to that of Sun Fire ×4600, a shared memory machine. The Cell BE is five times faster than AMD Opteron dual-core processor. The speedup of the algorithm on Cell BE increases with the increase in the number of SPEs. We also experiment with various parameters, such as number of subsets, number of processing elements, and number of DMA transfers between main memory and local memory, that impact the performance of the algorithm.
dc.description.versionPeer Reviewed
dc.identifier.citationMeilian Xu and Parimala Thulasiraman, “Mapping Iterative Medical Imaging Algorithm on Cell Accelerator,” International Journal of Biomedical Imaging, vol. 2011, Article ID 843924, 11 pages, 2011. doi:10.1155/2011/843924
dc.identifier.urihttp://dx.doi.org/10.1155/2011/843924
dc.identifier.urihttp://hdl.handle.net/1993/30515
dc.language.rfc3066en
dc.rightsopen accessen_US
dc.rights.holderCopyright © 2011 Meilian Xu and Parimala Thulasiraman. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.titleMapping Iterative Medical Imaging Algorithm on Cell Accelerator
dc.typeJournal Article
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