Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
EVALUATION OF THE EFFECT OF SCATTER CORRECTION ON LESION DETECTION INHEPATIC SPECT IMAGING
Autore:
DEVRIES DJ; KING MA; SOARES EJ; TSUI BMW; METZ CE;
Indirizzi:
UNIV MASSACHUSETTS,MED CTR,DEPT NUCL MED WORCESTER MA 01655 WORCESTER POLYTECH INST,DEPT BIOMED ENGN WORCESTER MA 01609 UNIV N CAROLINA,DEPT BIOMED ENGN CHAPEL HILL NC 00000 UNIV N CAROLINA,DEPT RADIOL CHAPEL HILL NC 00000 UNIV CHICAGO,MED CTR,DEPT RADIOL CHICAGO IL 60637
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 5, volume: 44, anno: 1997,
pagine: 1733 - 1740
SICI:
0018-9499(1997)44:5<1733:EOTEOS>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
OPERATING-CHARACTERISTIC CURVES; ENERGY-WEIGHTED ACQUISITION; ROC ANALYSIS; COMPUTED-TOMOGRAPHY; DECONVOLUTION; COMPENSATION; METHODOLOGY;
Keywords:
LESION DETECTION; ROC ANALYSIS; SCATTER CORRECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
D.J. Devries et al., "EVALUATION OF THE EFFECT OF SCATTER CORRECTION ON LESION DETECTION INHEPATIC SPECT IMAGING", IEEE transactions on nuclear science, 44(5), 1997, pp. 1733-1740

Abstract

The effect of scatter correction on the accuracy of lesion detection in single-photon emission computed tomography (SPECT) imaging requiresanalysis of observer performance. Experiments were designed to evaluate the class of correction methods that subtract counts. Simulations were used to approximate liver imaging with labeled antibodies. The lesion was a 2.5-cm-diameter, spherical, ''cold'' tumor. Ramp-filtered backprojection and noniterative Chang attenuation compensation were usedto approximate clinical practice. Perfect scatter rejection, defined as images containing only primary (nonscattered) photons, was selectedas the ideal case. These images were compared with uncorrected imagesfor conditions of both low-and high-scatter fractions (SF). The dual photopeak window (DPW) method was also tested to evaluate a practical subtraction correction. Receiver operating characteristic (ROC) experiments were conducted under signal-known-exactly (SKE) conditions, using the area under the curve as the index of accuracy. A statistically significant difference in detection was found only in a few experimentswhen scatter rejection was compared with no correction. The results suggest that scatter correction does not necessarily assure improved detection accuracy at a statistically significant level. However, corrections that produce conditions similar to ideal scatter rejection may offer such improvement in detection, particularly for cases of high SF's.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 10:23:04