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Titolo:
PHASED-ARRAY BREATH-HOLD VERSUS NON-BREATH-HOLD MR-IMAGING OF FOCAL LIVER-LESIONS - A PROSPECTIVE COMPARATIVE-STUDY
Autore:
YAMASHITA Y; YAMAMOTO H; NAMIMOTO T; ABE Y; TAKAHASHI M;
Indirizzi:
KUMAMOTO UNIV,SCH MED,DEPT RADIOL,1-1-1 HONJO KUMAMOTO 860 JAPAN
Titolo Testata:
Journal of magnetic resonance imaging
fascicolo: 2, volume: 7, anno: 1997,
pagine: 292 - 297
SICI:
1053-1807(1997)7:2<292:PBVNMO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONVENTIONAL SPIN-ECHO; SEQUENCES; ABDOMEN; RARE;
Keywords:
ABDOMINAL MRI; LIVER; NEOPLASMS; FAST IMAGING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
Y. Yamashita et al., "PHASED-ARRAY BREATH-HOLD VERSUS NON-BREATH-HOLD MR-IMAGING OF FOCAL LIVER-LESIONS - A PROSPECTIVE COMPARATIVE-STUDY", Journal of magnetic resonance imaging, 7(2), 1997, pp. 292-297

Abstract

This study was undertaken to determine whether phased array breath-hold T1- and T2-weighted sequences can replace non-breath-hold spin echo(SE) sequences in the imaging of focal liver lesions by comparing overall image quality, liver-lesion contrast, and artifact. Both breath-hold and non-breath-hold T1-weighted and T2-weighted imagings of focal liver lesions were prospectively compared in 120 patients with suspected focal liver lesions imaged at 1.5 T with use of a body phased arraymulticoil. Breath-hold images were acquired with T1-weighted fast low-angle shot (FLASH) and T2-weighted turbo spin echo (TSE) sequences, and non-breath-hold images were made with conventional T1- and T2-weighted SE sequences. Qualitative image analysis was done by three blindedreaders, and quantitative analysis was done. The highest signal-to-noise ratios were obtained with breath-hold T1-weighted FLASH sequence. The signal-to-noise ratios of breath-hold T2-weighted TSE sequence were slightly inferior to those of non-breath-hold SE sequence. Both T1-weighted and T2-weighted breath-hold sequences had less image artifact. Overall image quality of breath-hold sequences was better than that of non-breath-hold sequences for both T1- and T2-weighted sequences (P < 0.1). The tissue contrast of T1-weighted FLASH sequence was superiorto that of SE sequence (P < .01). On T2-weighted imaging, tissue contrast of solid lesions was better on conventional SE sequence than thaton breath-hold TSE sequence (P < .01). Respiratory ghost artifact wasless prominent on T1-weighted FLASH sequence, although this artifact was occasionally seen on breath-hold T2-weighted TSE sequence. In a state-of-art MR unit with use of a phased array multicoil, conventional T1-weighted can be replaced by breath-hold sequences. On T2-weighted imaging, because solid tumor-liver contrast an breath-hold TSE imaging is inferior to that on non-breath-hold SE image, breath-hold imaging may not replace conventional non-breath-field T2-weighted SE sequence.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 11:04:03