HEAL DSpace

Improving spatial resolution in SPECT with the combination of PSPMT based detector and iterative reconstruction algorithms

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dc.contributor.author Loudos, GK en
dc.contributor.author Nikita, KS en
dc.contributor.author Uzunoglo, NK en
dc.contributor.author Giokaris, ND en
dc.contributor.author Papanicolas, CN en
dc.contributor.author Archimandritis, SC en
dc.contributor.author Varvarigou, D en
dc.contributor.author Maintas, D en
dc.date.accessioned 2014-03-01T01:19:02Z
dc.date.available 2014-03-01T01:19:02Z
dc.date.issued 2003 en
dc.identifier.issn 0895-6111 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/15337
dc.subject Iterative algorithms en
dc.subject Position sensitive photomultiplier tube en
dc.subject Spatial resolution en
dc.subject SPECT en
dc.subject.classification Radiology, Nuclear Medicine & Medical Imaging en
dc.subject.other Algorithms en
dc.subject.other Cameras en
dc.subject.other Image reconstruction en
dc.subject.other Maximum likelihood estimation en
dc.subject.other Tomography en
dc.subject.other Spatial resolution en
dc.subject.other Photomultipliers en
dc.subject.other algorithm en
dc.subject.other article en
dc.subject.other crystal en
dc.subject.other image reconstruction en
dc.subject.other intermethod comparison en
dc.subject.other priority journal en
dc.subject.other scintillation camera en
dc.subject.other single photon emission computer tomography en
dc.subject.other three dimensional imaging en
dc.subject.other Algorithms en
dc.subject.other Gamma Cameras en
dc.subject.other Humans en
dc.subject.other Image Processing, Computer-Assisted en
dc.subject.other Imaging, Three-Dimensional en
dc.subject.other Phantoms, Imaging en
dc.subject.other Tomography, Emission-Computed, Single-Photon en
dc.title Improving spatial resolution in SPECT with the combination of PSPMT based detector and iterative reconstruction algorithms en
heal.type journalArticle en
heal.identifier.primary 10.1016/S0895-6111(02)00080-0 en
heal.identifier.secondary http://dx.doi.org/10.1016/S0895-6111(02)00080-0 en
heal.language English en
heal.publicationDate 2003 en
heal.abstract This paper investigates the possibility of developing a SPECT system that combines the high spatial resolution of position sensitive photomultiplier tubes (PSPMTs) with the excellent performance of iterative reconstruction algorithms. A small field of view (FOV) camera based on a PSPMT and a pixelized scintillation crystal made of CsI(TI) have been used for the acquisition of the projections. With the use of maximum likelihood expectation maximization (ML-EM) and ordered subsets expectation maximization (OSEM) slices of the object are obtained while three-dimensional (3D) reconstruction of the object is carried out using a modified marching cubes (MMC) algorithm. The spatial resolution of tomographic images obtained with the system was 2-3 mm. The spatial resolution of a conventional system that uses filtered backprojection (FBP) for slices reconstruction was more than 9 mm. (C) 2002 Elsevier Science Ltd. All rights reserved. en
heal.publisher PERGAMON-ELSEVIER SCIENCE LTD en
heal.journalName Computerized Medical Imaging and Graphics en
dc.identifier.doi 10.1016/S0895-6111(02)00080-0 en
dc.identifier.isi ISI:000182470100007 en
dc.identifier.volume 27 en
dc.identifier.issue 4 en
dc.identifier.spage 307 en
dc.identifier.epage 313 en


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