TY - JOUR
T1 - Optimization of gray/white matter contrast with fast inversion recovery for myelin suppression
T2 - A comparison of fast spin-echo and echo-planar MR imaging sequences
AU - Wolansky, Leo J.
AU - Finden, Steven G.
AU - Chen, Janet
AU - Hanna, Rafik
AU - Holodny, Andrei I.
AU - Ahmad, Imtiaz
AU - Liu, Wen Ching
AU - Contractor, Sohail
PY - 1999
Y1 - 1999
N2 - 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.
AB - 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.
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M3 - Article
C2 - 10543636
AN - SCOPUS:0032706134
SN - 0195-6108
VL - 20
SP - 1653
EP - 1657
JO - American Journal of Neuroradiology
JF - American Journal of Neuroradiology
IS - 9
ER -