Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Comparison of hotelling observer models and human observers in defect detection from myocardial SPECT imaging
Autore:
Wollenweber, SD; Tsui, BMW; Lalush, DS; Frey, EC; LaCroix, KJ; Gullberg, GT;
Indirizzi:
Univ N Carolina, Chapel Hill, NC 27514 USA Univ N Carolina Chapel Hill NCUSA 27514 olina, Chapel Hill, NC 27514 USA Univ Utah, Salt Lake City, UT USA Univ Utah Salt Lake City UT USAUniv Utah, Salt Lake City, UT USA
Titolo Testata:
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
fascicolo: 6, volume: 46, anno: 1999,
parte:, 3
pagine: 2098 - 2103
SICI:
0018-9499(199912)46:6<2098:COHOMA>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
FAN-BEAM SPECT; TRACE CRITERION; DETECTABILITY; PERFORMANCE; QUALITY; NOISE; METHODOLOGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Wollenweber, SD Univ N Carolina, Chapel Hill, NC 27514 USA Univ N Carolina Chapel Hill NC USA 27514 ll, NC 27514 USA
Citazione:
S.D. Wollenweber et al., "Comparison of hotelling observer models and human observers in defect detection from myocardial SPECT imaging", IEEE NUCL S, 46(6), 1999, pp. 2098-2103

Abstract

The objective of this study was to compare defect detection performance using a channelized Hotelling observer with radially symmetric channel (RSC) and oriented channels (OC) to that found in a previously reported human observer ROC study [1, 2]. The observer's task involved the detection of left-ventricular myocardial perfusion defects for Tc-99m sestamibi myocardial perfusion SPECT images. The images were reconstructed using the filtered-backprojection (FBP) algorithm without attenuation compensation or the maximum-likelihood expectation-maximization (ML-EM) algorithm with non-uniform attenuation compensation (AC), This was performed for cases with and without significant attenuation artifacts. The areas under the ROC curves for the Hotelling observers were calculated and compared to those for the human observers. The ML-EM reconstructed images (with AC) had high defect detectabilityacross all anatomy types, while with FBP, a lower detectability was found for cases where the reconstructed images contained attenuation artifacts inthe myocardium. Similar trends between the channelized Hotelling observer and those from the human observer study were found with both radially symmetric channel (RSC) and oriented-channel (OC) models. Further investigation of the channel models is needed to determine the number and alignment of orientations and the number and cutoff of frequency bands to improve agreement between human and Hotelling observer results.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 01:02:25