Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
INFLUENCE OF SPATIALLY HETEROGENEOUS BACKGROUND ACTIVITY ON HOT OBJECT QUANTITATION IN BRAIN EMISSION COMPUTED-TOMOGRAPHY
Autore:
LINKS JM; ZUBIETA JK; MELTZER CC; STUMPF MJ; FROST JJ;
Indirizzi:
JOHNS HOPKINS UNIV,SCH MED,DEPT RADIOL,615 N WOLFE ST BALTIMORE MD 21205
Titolo Testata:
Journal of computer assisted tomography
fascicolo: 4, volume: 20, anno: 1996,
pagine: 680 - 687
SICI:
0363-8715(1996)20:4<680:IOSHBA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PET; RESOLUTION; VALUES;
Keywords:
MAGNETIC RESONANCE IMAGING, PHYSICS AND INSTRUMENTATION; QUANTITATION; RECOVERY COEFFICIENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Links et al., "INFLUENCE OF SPATIALLY HETEROGENEOUS BACKGROUND ACTIVITY ON HOT OBJECT QUANTITATION IN BRAIN EMISSION COMPUTED-TOMOGRAPHY", Journal of computer assisted tomography, 20(4), 1996, pp. 680-687

Abstract

Purpose: Our goal was to evaluate the influence of spatially heterogeneous background activity on ''hot object'' quantitation in brain emission CT. Method: We studied the effects of spatially heterogeneous background activity on hot object quantitative recovery in simulations ofboth spheres and realistic brain distributions (utilizing human MRI data). Results: Significant underestimation of object activity concentration was seen for both cortical and subcortical hot objects, with increasing underestimation for increasing hot object/surrounding gray matter contrast. Significant ''spill-in'' of counts from surrounding activity was present. Conclusion: Hot objects are significantly influencedby both ''spill-out'' and ''spill-in. '' Qualitative and quantitative analyses of such objects must explicitly consider both spill-out and spill-in; this implies a correction scheme that goes beyond simple division of the observed value by a conventional recovery coefficient.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 15:41:43