RT Journal Article
SR Electronic
T1 Optimization of Gray/White Matter Contrast with Fast Inversion Recovery for Myelin Suppression: A Comparison of Fast Spin-Echo and Echo-Planar MR Imaging Sequences
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1653
OP 1657
VO 20
IS 9
A1 Wolansky, Leo J.
A1 Finden, Steven G.
A1 Chen, Janet
A1 Hanna, Rafik
A1 Holodny, Andrei I.
A1 Ahmad, Imtiaz
A1 Liu, Wen Ching
A1 Contractor, Sohail
YR 1999
UL http://www.ajnr.org/content/20/9/1653.abstract
AB Summary: We compared two MR imaging sequences, fast inversion recovery for myelin suppression (FIRMS) and echo-planar FIRMS (EP-FIRMS), for depicting gray/white matter contrast. In 18 patients, the frequency bandwidth (BW) was optimized for each sequence; in nine patients, the BW was held constant. In the BW-optimized group, the mean contrast-to-noise ratio (C/N) was three times higher with the FIRMS sequence. In the BW-constant group, the mean C/N was 27% higher with the EP-FIRMS sequence; however, geometric distortion degraded the EP-FIRMS images excessively. For optimal gray/white contrast, FIRMS appears to be the superior pulse sequence.