The detective quantum efficiency (DQE) for evaluating the performance of a small gamma camera system with a uniformly redundant array (URA) collimator

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Presently, the gamma scintillation camera is widely used in various industrial, environmental and medical diagnostic fields. Hence, the objective and quantitative evaluation of its imaging performance is required for imaging quality assurance and excessive exposures prevention. In this study, the detective quantum efficiency (DQE) of a small gamma camera with three pinholes (1, 2, and 4 mm in hole diameter) and one-coded aperture (uniformly redundant array (URA); 286 holes, hole diameter 2 mm) collimator was determined using modulation transfer function (MTF), normalized noise power spectrum (NNPS), and incoming signal-to-noise ratio (SNR). We found that the resolution of URA was a little lower than that of the pinhole, 2 mm in hole diameter, and the noise of URA was prominently lower than that of all pinholes. Thus, the DQE of URA was higher than that of the pinhole. We found that the determination of DQE could be a quantitative and effective method to evaluate gamma camera systems performances. (C) 2008 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2008-06
Language
English
Article Type
Article; Proceedings Paper
Citation

NUCLEAR INSTRUMENTS METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.591, no.1, pp.279 - 281

ISSN
0168-9002
URI
http://hdl.handle.net/10203/10295
Appears in Collection
NE-Journal Papers(저널논문)
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