Projection process modelling for iterative reconstruction of Pinhole SPECT

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dc.contributor.authorLin, Jen_AU
dc.contributor.authorKench, PLen_AU
dc.contributor.authorGrégoire, MCen_AU
dc.contributor.authorMeikle, SRen_AU
dc.date.accessioned2014-09-03T02:37:53Zen_AU
dc.date.available2014-09-03T02:37:53Zen_AU
dc.date.issued2010-10-01en_AU
dc.date.statistics2014-09-03en_AU
dc.description.abstractIn iterative reconstruction of pinhole SPECT data, the forward and back projection processes are often performed using the ray tracing method. Ray tracing is computationally efficient, but it has the drawback of poor reconstruction quality due to the missing voxel effect and textural artefacts. In this paper, the pinhole projection process was modelled starting from consideration of all the main factors affecting pinhole projection, such as voxel shape, penetration of the pinhole edges and detector response. Next, approximations were made to reduce the computational speed and the effect of the approximations on reconstructed image accuracy was evaluated in simulation and phantom experiments and compared with the ray tracing algorithm. When used in conjunction with the ML-EM algorithm, the proposed model improved reconstructed image accuracy compared with the ray tracing method and achieved comparable computational efficiency. Therefore, the proposed projection model is a practical alternative to the ray tracing algorithm for pinhole SPECT reconstruction.© 2010, Institute of Electrical and Electronics Engineers (IEEE)en_AU
dc.identifier.citationLin, J., Kench, P. L., Grégoire, M. & Meikle, S. R. (2010). Projection process modelling for iterative reconstruction of pinhole SPECT. IEEE Transactions on Nuclear Science, 57(5), 2578-2586. doi:10.1109/TNS.2010.2056932.en_AU
dc.identifier.govdoc5689en_AU
dc.identifier.issn0018-9499en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleIEEE Transactions on Nuclear Scienceen_AU
dc.identifier.pagination2578-2586en_AU
dc.identifier.urihttp://dx.doi.org/10.1109/TNS.2010.2056932en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5840en_AU
dc.identifier.volume57en_AU
dc.language.isoenen_AU
dc.publisherIEEEen_AU
dc.subjectSingle photon emission computed tomographyen_AU
dc.subjectResolutionen_AU
dc.subjectIterative methodsen_AU
dc.subjectEfficiencyen_AU
dc.subjectApproximationsen_AU
dc.subjectSimulationen_AU
dc.titleProjection process modelling for iterative reconstruction of Pinhole SPECTen_AU
dc.typeJournal Articleen_AU
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