Publication
Title
Contrast noise behaviour of a rotating slat collimated gamma camera
Author
Abstract
Compared to classical parallel hole (PH) collimated gamma cameras, the geometry of a rotating slat (RS) collimated detector implies a better sensitivity versus resolution trade-off. Nevertheless, the expected improvement in image quality from this device is degraded due to the assumptions made during the image reconstruction of planar images. This study shows that an accurate model of the imaging process for iterative reconstruction is necessary in order to improve planar image quality. To this end, a Monte Carlo based system matrix was derived from a simple simulation by exploiting the rotational and translational symmetries present in this acquisition set-up. It was found that this system matrix improves the contrast and noise characteristics of reconstructed images compared to a reconstruction with no modelling. As a result, the RS device is able to yield improved quality for planar images compared to a PH camera.
Language
English
Source (journal)
Nuclear instruments and methods in physics research: A: accelerators, spectrometers, detectors and associated equipment
Publication
2007
Volume/pages
571:1/2(2007), p. 274-277
ISI
000244599100066
Full text (Publishers DOI)
Full text (publishers version - intranet only)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 15.11.2011
Last edited 05.05.2017