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Titolo:
CONSISTENT FAT-SUPPRESSION WITH COMPENSATED SPECTRAL-SPATIAL PULSES
Autore:
BLOCK W; PAULY J; KERR A; NISHIMURA D;
Indirizzi:
STANFORD UNIV,DEPT ELECT ENGN,MAGNET RESONANCE SYST RES LAB,303 DURAND BLDG STANFORD CA 94305
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 2, volume: 38, anno: 1997,
pagine: 198 - 206
SICI:
0740-3194(1997)38:2<198:CFWCSP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELECTIVE EXCITATION; SPIN; CONTRAST;
Keywords:
MAGNETIC RESONANCE IMAGING; T-2 IMAGING; FAT SUPPRESSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
W. Block et al., "CONSISTENT FAT-SUPPRESSION WITH COMPENSATED SPECTRAL-SPATIAL PULSES", Magnetic resonance in medicine, 38(2), 1997, pp. 198-206

Abstract

Reliable fat suppression is especially important with fast imaging techniques such as echo-planar (EPI), spiral, and fast spin-echo (FSE) T-2-weighted imaging. Spectral-spatial excitation has a number of advantages over spectrally selective presaturation techniques, including better resilience to B-0 and B-1 inhomogeneity, In this paper, a FSE sequence using a spectral-spatial excitation pulse for superior fat suppression is presented, previous problems maintaining the CPMG condition are solved using simple methods to accurately program radio-frequency (RF) phase, Next an analysis shows how B-0 eddy currents can reduce fat suppression effectiveness for spectral-spatial pulses designed for conventional gradient systems. Three methods to compensate for the degradation are provided. Both the causes of the degradation and the compensation techniques apply equally to gradient-recalled applications using these pulses, These problems do not apply to pulses designed for high-speed gradient systems, The spectral-spatial FSE sequence delivers clinically lower fat signal with better uniformity than spectrally selective pre-saturation techniques.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/10/20 alle ore 09:03:04