AJDRAJNR - American Journal of Neuroradiology

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Rockwell, D. T.
Right arrow Articles by Bhatia, R. G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Rockwell, D. T.
Right arrow Articles by Bhatia, R. G.

American Journal of Neuroradiology, Vol 18, Issue 10 1923-1928, Copyright © 1997 by American Society of Neuroradiology

ARTICLES

GRASE (gradient- and spin-echo) MR of the brain

DT Rockwell, ER Melhem and RG Bhatia
Department of Radiology, Boston University Medical Center, MA 02118, USA.

PURPOSE: To assess the clinical utility of GRASE (gradient- and spin- echo) MR imaging of the brain by comparing it with the T2-weighted turbo spin-echo technique. METHODS: Fifty-three consecutive patients referred for MR imaging of the brain were studied with T2-weighted turbo spin-echo and GRASE techniques, matched for effective echo time (110 milliseconds), echo train length (eight), and spatial resolution. The examinations were evaluated independently by two neuroradiologists for lesion detection (high- and low-signal-intensity lesions) and lesion conspicuity, and for susceptibility, motion, and chemical-shift artifacts. RESULTS: The GRASE technique provided greater detection of both high- and low-signal-intensity lesions and of low-signal-intensity lesions with paramagnetic susceptibility characteristics (ie, calcium and hemorrhage). Chemical-shift artifacts in the frequency-encoding direction were more prominent with the turbo spin-echo technique, whereas chemical-shift artifacts in the phase-encoding direction were more prominent with the GRASE technique. There was no significant difference in the degree of diamagnetic susceptibility artifacts at the base of the skull, or in motion artifacts. CONCLUSION: T2-weighted GRASE is a fast imaging technique with a potential for replacing turbo spin-echo in routine MR imaging of the brain. GRASE maintains the contrast resolution of turbo spin-echo imaging and is better at depicting lesions with paramagnetic susceptibility characteristics.


This article has been cited by other articles:


Home page
 Am. J. Neuroradiol.Home page
M. R. Patel and R. A. Klufas
Gradient- and Spin-Echo MR Imaging of the Brain
AJNR Am. J. Neuroradiol., August 1, 1998; 20(7): 1381 - 1383.
[Full Text]

Home page
 Am. J. Neuroradiol.Home page
E. R. Melhem
Reply
AJNR Am. J. Neuroradiol., August 1, 1998; 20(7): 1382 - 1383.
[Full Text]


Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X