Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
PARTIALLY SATURATED FLUID ATTENUATED INVERSION-RECOVERY (FLAIR) SEQUENCES IN MULTIPLE-SCLEROSIS - COMPARISON WITH FULLY RELAXED FLAIR AND CONVENTIONAL SPIN-ECHO
Autore:
BARATTI C; BARKHOF F; HOOGENRAAD F; VALK J;
Indirizzi:
FREE UNIV AMSTERDAM HOSP,DEPT DIAGNOST RADIOL,POB 7057 1007 MB AMSTERDAM NETHERLANDS FREE UNIV AMSTERDAM HOSP,DEPT DIAGNOST RADIOL 1007 MB AMSTERDAM NETHERLANDS
Titolo Testata:
Magnetic resonance imaging
fascicolo: 4, volume: 13, anno: 1995,
pagine: 513 - 521
SICI:
0730-725X(1995)13:4<513:PSFAI(>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Keywords:
FLUID ATTENUATED INVERSION RECOVERY (FLAIR); MULTIPLE SCLEROSIS (MS); CEREBROSPINAL FLUID (CSF); NORMAL APPEARING WHITE MATTER (NAWM);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
C. Baratti et al., "PARTIALLY SATURATED FLUID ATTENUATED INVERSION-RECOVERY (FLAIR) SEQUENCES IN MULTIPLE-SCLEROSIS - COMPARISON WITH FULLY RELAXED FLAIR AND CONVENTIONAL SPIN-ECHO", Magnetic resonance imaging, 13(4), 1995, pp. 513-521

Abstract

Fluid attenuated inversion recovery (FLAIR) sequences produce selective cerebrospinal fluid (CSF) suppression by employing a very long inversion time (TI). We used the FLAIR sequence to study patients with multiple sclerosis (MS) at 0.6 T. So far, a very long TR (and long acquisition time) has been used in a fully relaxed (FR-FLAIR) system. To speed up the FLAIR sequences, we used a shorter TR, and demonstrated thatcomplete CSF suppression can be maintained with partial saturation (PS-FLAIR) by reducing TI at the same time. The introduction of partial saturation, however, reduced the contrast between lesions and normal appearing white matter (NAWM). Suboptimal CSF suppression therefore hadto be accepted to maintain sufficient lesion to NAWM contrast. Using a TE of 60 ms, the PS-FLAIR and PR-FLAIR performed equally well in thedetection of MS-lesions, although the former provided poorer CSF suppression. Both FLAIR sequences, however, provided poorer contrast between lesions and NAWM compared to conventional spin-echo sequences. Although the long acquisition time of the FLAIR sequence can be reduced byusing partial saturation, complete CSF suppression and good lesion toNAWM contrast are incompatible at short TRs. Using a TE of 60 ms, conventional spin-echo sequences detect more lesions and provide better contrast between lesions and NAWM than FLAIR sequences in MS patients.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 07:44:04