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Titolo:
MAGNETIC-RESONANCE-IMAGING OF THE BRAIN WITH GADOPENTETATE DIMEGLUMINE-DTPA - COMPARISON OF T1-WEIGHTED SPIN-ECHO AND 3D GRADIENT-ECHO SEQUENCES
Autore:
LI DB; HAACKE EM; TARR RW; VENKATESAN R; LIN WL; WIELOPOLSKI P;
Indirizzi:
WASHINGTON UNIV,MALLINCKRODT INST RADIOL,510 S KINGSHIGHWAY ST LOUIS MO 63110
Titolo Testata:
Journal of magnetic resonance imaging
fascicolo: 3, volume: 6, anno: 1996,
pagine: 415 - 424
SICI:
1053-1807(1996)6:3<415:MOTBWG>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
MP-RAGE; STEADY-STATE; CONTRAST; SIGNAL; GADOLINIUM; NOISE; ENHANCEMENT;
Keywords:
BRAIN, MR STUDIES; MAGNETIC RESONANCE (MR); PULSE SEQUENCES; RAPID IMAGING; 3D IMAGING; CONTRAST AGENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
D.B. Li et al., "MAGNETIC-RESONANCE-IMAGING OF THE BRAIN WITH GADOPENTETATE DIMEGLUMINE-DTPA - COMPARISON OF T1-WEIGHTED SPIN-ECHO AND 3D GRADIENT-ECHO SEQUENCES", Journal of magnetic resonance imaging, 6(3), 1996, pp. 415-424

Abstract

TR, short TE, high resolution, 3D gradient-recalled echo (GRE) imaging was evaluated for lesion detection in the brain, High resolution 3D GRE data acquisition was used to reduce partial volume effects and nowartifacts, to better visualize smaller structures, to minimize signallosses caused by held inhomogeneities, and to allow better image reformatting. Spin-echo (SE) and 3D GRE approaches were compared for lesion detection after the administration of an MR contrast agent, gadopentetate dimeglumine. Preliminary clinical studies demonstrated that the signal-to-noise ratio (SNR) in each slice of the GRE scan was worse than that of the SE scan because of the much thicker slices acquired with the SE technique, However, by averaging two adjacent 3D slices, the SNR of the two methods was essentially equivalent, In the averaged GREslices, large lesions were seen just as well as in the SE images, More importantly, small lesions were better visualized in the thin 3D GREimages than in the thick SE images for the lesions studied in this work and the protocols used. These observations were confirmed by theoretical simulations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 19:42:45