Evaluation of the Feasibility and Quantitative Accuracy of a Generalized Scatter 2D PET Reconstruction Method

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dc.contributor.authorSun, Hongyan
dc.contributor.authorPistorius, Stephen
dc.date.accessioned2015-05-14T16:17:39Z
dc.date.available2015-05-14T16:17:39Z
dc.date.issued2013-2-28
dc.date.updated2015-03-29T13:28:33Z
dc.description.abstractScatter degrades the contrast and quantitative accuracy of positron emission tomography (PET) images, and most methods for estimating and correcting scattered coincidences in PET subtract scattered events from the measured data. Compton scattering kinematics can be used to map out the locus of possible scattering locations. These curved lines (2D) or surfaces (3D), which connect the coincidence detectors, encompass the surface (2D) or volume (3D) where the decay occurs. In the limiting case where the scattering angle approaches zero, the scattered coincidence approaches the true coincidence. Therefore, both true and scattered coincidences can be considered similarly in a generalized scatter maximum-likelihood expectation-maximization reconstruction algorithm. The proposed method was tested using list-mode data obtained from a GATE simulation of a Jaszczak-type phantom. For scatter fractions from 10% to 60%, this approach reduces noise and improves the contrast recovery coefficients by 0.5–3.0% compared with reconstructions using true coincidences and by 3.0–24.5% with conventional reconstruction methods. The results demonstrate that this algorithm is capable of producing images entirely from scattered photons, eliminates the need for scatter corrections, increases image contrast, and reduces noise. This could be used to improve diagnostic quality and/or to reduce patient dose and radiopharmaceutical cost.
dc.description.versionPeer Reviewed
dc.identifier.citationHongyan Sun and Stephen Pistorius, “Evaluation of the Feasibility and Quantitative Accuracy of a Generalized Scatter 2D PET Reconstruction Method,” ISRN Biomedical Imaging, vol. 2013, Article ID 943051, 11 pages, 2013. doi:10.1155/2013/943051
dc.identifier.urihttp://dx.doi.org/10.1155/2013/943051
dc.identifier.urihttp://hdl.handle.net/1993/30480
dc.language.rfc3066en
dc.rightsopen accessen_US
dc.rights.holderCopyright © 2013 Hongyan Sun and Stephen Pistorius. 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.titleEvaluation of the Feasibility and Quantitative Accuracy of a Generalized Scatter 2D PET Reconstruction Method
dc.typeJournal Article
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