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T2-weighted three-dimensional MP-RAGE MR imaging

✍ Scribed by John P. Mugler III; Thomas A. Spraggins; James R. Brookeman

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
795 KB
Volume
1
Category
Article
ISSN
1053-1807

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✦ Synopsis

Abstract

The application of three‐dimensional (3D) magnetization‐prepared rapid‐gradientecho (MP‐RAGE) imaging to the acquisition of T2‐weighted 3D data sets has been investigated, with a 90~x~°–180~y~°−90~−x~° pulse set (driven equilibrium) for the T2 contrast preparation. A theoretical model was used to study the contrast behavior of brain tissue. The effects of radiofrequency and static‐field inhomogeneities and eddy currents on the T2 contrast preparation and the effects of eddy currents on the gradientecho acquisition resulted in blurring and intensity banding artifacts. With a multistep gradient preparation, these artifacts could be suppressed. With further development, this technique may yield a clinically practical method for obtaining T2‐weighted 3D data sets of relatively large volumes (eg, the whole head) suitable for multiplanar reformatting.

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