Premium
RARE imaging: A fast imaging method for clinical MR
Author(s) -
Hennig J.,
Nauerth A.,
Friedburg H.
Publication year - 1986
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910030602
Subject(s) - computer science , echo (communications protocol) , weighting , artificial intelligence , phase (matter) , signal (programming language) , computer vision , image (mathematics) , sampling (signal processing) , steady state free precession imaging , physics , magnetic resonance imaging , acoustics , medicine , computer network , filter (signal processing) , quantum mechanics , radiology , programming language
Abstract Based on the principles of echo imaging, we presnet a method to acquire sufficient data for a 256 × 256 image in from 2 to 40s. The image contrast is dominated by the transverse relaxation time T 2 Sampling all projections for 2D FT image reconstruction in one (or a few) echo trains leads to image artifacts due to the different T 2 weighting of the echo. These artifacts cannot be described by a simple smearing out of the image in the phase direction. Proper distribution of the phase‐encoding steps on the echoes can be used to minimize artifacts and even lead to resolution enhancement. In spite of the short data acquisition times, the signal amplitudes of structures with long T 2 are nearly the same as those in a conventional 2D FT experiment. Our method, therefore, is an ideal screening technique for lesions with long T 2 . © 1986 Academic Press, Inc.