A comparative evaluation of scatter correction techniques in high resolution detectors based on PSPMTs and scintillator arrays

Karali, E; Loudos, G; Sakelios, N; Nikita, KS; Giokaris, N

dc.contributor.author	Karali, E	en
dc.contributor.author	Loudos, G	en
dc.contributor.author	Sakelios, N	en
dc.contributor.author	Nikita, KS	en
dc.contributor.author	Giokaris, N	en
dc.date.accessioned	2014-03-01T02:42:23Z
dc.date.available	2014-03-01T02:42:23Z
dc.date.issued	2004	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30973
dc.subject	Pixelized scintillators	en
dc.subject	Scatter correction	en
dc.subject.other	Computerized tomography	en
dc.subject.other	Image reconstruction	en
dc.subject.other	Medical imaging	en
dc.subject.other	Phosphors	en
dc.subject.other	Photomultipliers	en
dc.subject.other	Photons	en
dc.subject.other	Scattering	en
dc.subject.other	Tumors	en
dc.subject.other	Convolution substraction technique (CST)	en
dc.subject.other	Deconvolution technique (DT)	en
dc.subject.other	Pixelized scintillators	en
dc.subject.other	Scatter correction	en
dc.subject.other	Imaging systems	en
dc.title	A comparative evaluation of scatter correction techniques in high resolution detectors based on PSPMTs and scintillator arrays	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/IST.2004.1397273	en
heal.identifier.secondary	http://dx.doi.org/10.1109/IST.2004.1397273	en
heal.publicationDate	2004	en
heal.abstract	SPECT images suffer from law contrast as a result of photons scatter. The standard method for excluding scatter component in pixelized scintillators is the application of an energy window around the central photopeak channel of each crystal cell, but small angle scattered photons still appear in the photopeak window and they are included in the reconstructed images. A number of scatter correction techniques have been proposed in order to estimate the scatter component but they have not yet been applied in pixelized scintillators, where most groups use the standard one-photopeak window for scatter correction. In this work we have assessed three subtraction techniques that use a different approach in order to calculate the scatter component and subtract it from the photopeak image: The Dual Energy Window Subtraction Technique (DEWST) the Convolution Subtraction Technique (CST) and a Deconvolution Technique (DT). All these techniques are compared to the standard method.	en
heal.journalName	2004 IEEE International Workshop on Imaging Systems and Techniques, IST	en
dc.identifier.doi	10.1109/IST.2004.1397273	en
dc.identifier.spage	18	en
dc.identifier.epage	21	en