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ACUT 2 E TSE‐SSFP: A hybrid method for T2‐weighted imaging of edema in the heart
Author(s) -
Aletras Anthony H.,
Kellman Peter,
Derbyshire J. Andrew,
Arai Andrew E.
Publication year - 2008
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.21490
Subject(s) - steady state free precession imaging , nuclear magnetic resonance , nuclear medicine , medicine , magnetic resonance imaging , physics , radiology
ACUT 2 E TSE‐SSFP is a hybrid between steady state free precession (SSFP) and turbo spin echo (TSE) for bright‐blood T2‐weighted imaging with signal‐to‐noise ratio (SNR) and contrast‐to‐noise ratio (CNR) similar to dark‐blood TSE. TSE‐SSFP uses a segmented SSFP readout during diastole with 180° pulses following a 90° preparation. The 180° refocusing pulses make TSE‐SSFP similar to TSE but TSE‐SSFP uses gradient moment nulling, whereas TSE uses gradient crushing. TSE‐SSFP produced T2‐weighted images with minimal T1 weighting. TSE‐SSFP and TSE had similar SNR (155.9 ± 6.0 vs 160.9 ± 7.0; P = NS) for acute myocardial infarction (MI) and twice the SNR of T2‐prepared SSFP (73.1 ± 3.4, P < 0.001). TSE‐SSFP and TSE had approximately double the CNR of T2‐prepared SSFP for differentiating acute MI from normal myocardium. Imperfect blood suppression, present in all animals on some TSE images, was a problem eliminated by TSE‐SSFP and T2‐prepared SSFP. Magn Reson Med 59:229–235, 2008. © 2008 Wiley‐Liss, Inc.