RT Journal Article
SR Electronic
T1 Rapid MR imaging of the pediatric brain using the fast spin-echo technique.
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1169
OP 1177
VO 13
IS 4
A1 S S Ahn
A1 M T Mantello
A1 K M Jones
A1 R V Mulkern
A1 P S Melki
A1 N Higuchi
A1 P D Barnes
YR 1992
UL http://www.ajnr.org/content/13/4/1169.abstract
AB PURPOSE To evaluate diagnostic reliability and to establish optimal scanning techniques of a recently developed Fast Spin-echo MR pulse sequence that allows rapid proton density-weighted and T2-weighted imaging.METHODS We compared lesion conspicuity and signal intensity measurements on Fast Spin-echo and conventional spin-echo sequences in 81 patients ranging from 1 week to 25 years in age on a 1.5-T MR unit. A total of 28 Fast Spin-echo dual-echo images (14 slice locations) were obtained in 2:08 minutes with a 256 x 128 matrix or in 3:12 minutes with a 256 x 192 matrix at a TR of 2000 msec and two excitations.RESULTS Lesion conspicuity and characterization on Fast Spin-echo images compared favorably with conventional spin-echo images in our series when pseudo-TEs of 15 and 90 msec were employed for proton density-weighted and T2-weighted images, respectively. Fast Spin-echo images yielded diagnostic information in four nonsedated patients whose conventional spin-echo images were either degraded by motion or unobtainable. Fat signal remained bright on T2-weighted Fast Spin-echo images. Magnetic-susceptibility effects were slightly reduced with Fast Spin-echo but did not pose any diagnostic problem in our series.CONCLUSION Diagnostically reliable rapid dual-echo brain images can be obtained with Fast Spin-echo sequences.