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Titolo:
The value of respiratory triggered T2-weighted turbo spin-echo imaging of the liver using a phased array coil
Autore:
Namimoto, T; Yamashita, Y; Mitsuzaki, K; Takahashi, M;
Indirizzi:
Kumamoto Univ, Dept Radiol, Sch Med, Kumamoto 860, Japan Kumamoto Univ Kumamoto Japan 860 pt Radiol, Sch Med, Kumamoto 860, Japan
Titolo Testata:
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING
fascicolo: 3, volume: 8, anno: 1998,
pagine: 655 - 662
SICI:
1053-1807(199805/06)8:3<655:TVORTT>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPPRESSION TECHNIQUE MAST; FAT-SUPPRESSION; GRADIENT-ECHO; MR; ABDOMEN; SEQUENCES; ARTIFACTS; MOTION; RARE;
Keywords:
liver; MRI; respiratory triggered; breath-hold; artifact;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Namimoto, T Kumamoto Univ, Dept Radiol, Sch Med, 1-1-1 Honjo, Kumamoto 860, Japan Kumamoto Univ 1-1-1 Honjo Kumamoto Japan 860 amoto 860, Japan
Citazione:
T. Namimoto et al., "The value of respiratory triggered T2-weighted turbo spin-echo imaging of the liver using a phased array coil", J MAGN R I, 8(3), 1998, pp. 655-662

Abstract

The purpose of this study was to evaluate the value of the respiratory triggered turbo spin-echo (TSE) technique for T2-weighted MRI of liver lesions. Fifty-nine patients (32 men, 27 women; mean age, 63.3 years) with focal hepatic lesions were prospectively studied with MRI at 1.5 T with use of a body phased array coil. In the first 15 patients, breath-hold TSE, respiratory triggered TSE, and conventional nonrespiratory triggered TSE T2-weightedimaging were compared. Because nonrespiratory triggered TSE imaging was significantly inferior (P < .01) to breath-hold or respiratory triggered images, breath-hold and respiratory triggered TSE T2-weighted images were compared in the remaining 44 patients. Images were analyzed quantitatively by measuring the liver signal-to-noise ratio and the lesion-liver and spleen-liver contrast-to-noise ratios and qualitatively by evaluating the lesion conspicuity, liver parenchymal homogeneity, and sharpness of intrahepatic vessels. The imaging time was 26 seconds for breath-hold TSE imaging, 49 to 219 seconds (mean, 149 seconds) for the respiratory triggered TSE imaging, and 79 to 379 seconds (mean, 239 seconds) for the nonrespiratory triggered TSE imaging. Quantitatively, the signal-to-noise ratio of the liver for breath-hold imaging was comparable to that for respiratory triggered imaging, The lesion-liver and liver-spleen contrast-to-noise ratios for the respiratory triggered images were greater by 37% and 39%, respectively, than for the breath-hold T2-weighted TSE images. Qualitatively, the respiratory triggered images showed lower frequency of image artifact, better lesion conspicuity,and greatly superior depiction of intrahepatic structures compared with the breath-hold T2-weighted TSE images. The respiratory triggered T2-weightedTSE technique provides better quality liver images than the breath-hold TSE technique or nonrespiratory triggered technique within a reasonable acquisition time.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 09:36:06