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Generating multiple contrasts using single‐shot radial T 1 sensitive and insensitive steady‐state imaging
Author(s) -
Benkert Thomas,
Bartsch Andreas J.,
Blaimer Martin,
Jakob Peter M.,
Breuer Felix A.
Publication year - 2015
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.25337
Subject(s) - computer science , weighting , single shot , contrast (vision) , fast spin echo , steady state (chemistry) , precession , physics , image resolution , nuclear magnetic resonance , algorithm , artificial intelligence , magnetic resonance imaging , optics , acoustics , chemistry , medicine , astronomy , radiology
Purpose Recently, the (Resolution Enhanced‐) T 1 insensitive steady‐state imaging (TOSSI) approach has been proposed for the fast acquisition of T 2 ‐weighted images. This has been achieved by balanced steady‐state free precession (bSSFP) imaging between unequally spaced inversion pulses. The purpose of this work is to present an extension of this technique, considerably increasing both the efficiency and possibilities of TOSSI. Theory and Methods A radial trajectory in combination with an appropriate view‐sharing reconstruction is used. Because each projection traverses the contrast defining k‐space center, several different contrasts can be extracted from a single‐shot measurement. These contrasts include various T 2 ‐weightings and T 2 /T 1 ‐weighting if an even number of inversion pulses is used, while an odd number allow the generation of several images with predefined tissue types cancelled. Results The approach is validated for brain and abdominal imaging at 3.0 Tesla. Results are compared with RE‐TOSSI, bSSFP, and turbo spin‐echo images and are shown to provide similar contrasts in a fraction of scan time. Furthermore, the potential utility of the approach is illustrated by images obtained from a brain tumor patient. Conclusion Radial T 1 sensitive and insensitive steady‐state imaging is able to generate multiple contrasts out of one single‐shot measurement in a short scan time. Magn Reson Med 73:2129–2141, 2015. © 2014 Wiley Periodicals, Inc.