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Titolo:
GADOLINIUM-ENHANCED BREATH-HOLD 3-DIMENSIONAL TIME-OF-FLIGHT MR-ANGIOGRAPHY OF THE ABDOMINAL AND PELVIC VESSELS - THE VALUE OF ULTRAFAST MP-RAGE SEQUENCES
Autore:
YAMASHITA Y; MITSUZAKI K; TANG Y; NAMIMOTO T; TAKAHASHI M;
Indirizzi:
KUMAMOTO UNIV,SCH MED,DEPT RADIOL,1-1-1 HONJO KUMAMOTO 860 JAPAN
Titolo Testata:
Journal of magnetic resonance imaging
fascicolo: 4, volume: 7, anno: 1997,
pagine: 623 - 628
SICI:
1053-1807(1997)7:4<623:GB3TM>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRAIN; ECHO;
Keywords:
MR VASCULAR STUDIES; GADOLINIUM; MP-RAGE; MR FAST IMAGING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
Y. Yamashita et al., "GADOLINIUM-ENHANCED BREATH-HOLD 3-DIMENSIONAL TIME-OF-FLIGHT MR-ANGIOGRAPHY OF THE ABDOMINAL AND PELVIC VESSELS - THE VALUE OF ULTRAFAST MP-RAGE SEQUENCES", Journal of magnetic resonance imaging, 7(4), 1997, pp. 623-628

Abstract

MR angiography (MRA) was performed in 50 consecutive subjects (mean age, 59 years), who had been referred for abdominal MRA, on a 1.5-T superconductive unit that used a body phased-array coil, Three breath-hold three-dimensional sequences were evaluated both in phantom and clinical studies: (a) standard fast three-dimensional gradient-echo sequence (TR = 15; TE = 6; imaging time, 32 seconds), (b) ultrafast three-dimensional gradient-echo sequence (TR = 8.2, TE = 3; imaging time, 18 seconds), and (c) ultrafast magnetization-prepared (MF) rapid acquisition gradient echo (RAGE) (TR = 5.8, TE = 2.9, inversion time [TI] = 20; imaging time, 15 seconds). The initial 30 patients were randomized into three groups by three separate sequences. For the remaining 20 patients, ultrafast-gradient-echo and ultrafast MP-RAGE sequences were performed, Conventional angiography was performed on 36 patients. Signal measurements of the phantom and clinical images of the aorta, visceral branches of the aorta, iliac arteries, inferior vena cavae, and portalveins were performed, The overall image quality and background fatty tissue contrast of the vessels were rated subjectively, Comparison of images between MRA and conventional angiography also was performed, The contrast between the vessels and background fatty tissue was significantly higher in the ultrafast MP-RAGE sequence in both quantitative and qualitative analysis, and image-quality ultrafast MP-RAGE was superior to the other two sequences (P < .01), The aorta and iliac arteriescould be visualized in all pulse sequences, and abnormalities of these vessels were diagnosed correctly, The renal artery was visualized more clearly with the two ultrafast sequences.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 11:56:52