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

Loudos, GK; Nikita, KS; Uzunoglo, NK; Giokaris, ND; Papanicolas, CN; Archimandritis, SC; Varvarigou, D; Maintas, D

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