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Motion‐corrected free‐breathing delayed enhancement imaging of myocardial infarction
Author(s) -
Kellman Peter,
Larson Andrew C.,
Hsu LiYueh,
Chung YiuCho,
Simonetti Orlando P.,
McVeigh Elliot R.,
Arai Andrew E.
Publication year - 2005
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.20333
Subject(s) - computer science , image resolution , artificial intelligence , computer vision , breathing , nuclear medicine , medicine , anatomy
Abstract Following administration of Gd‐DTPA, infarcted myocardium exhibits delayed enhancement and can be imaged using an inversion‐recovery sequence. A conventional segmented acquisition requires a number of breath‐holds to image the heart. Single‐shot phase‐sensitive inversion‐recovery (PSIR) true‐FISP may be combined with parallel imaging using SENSE to achieve high spatial resolution. SNR may be improved by averaging multiple motion‐corrected images acquired during free breathing. PSIR techniques have demonstrated a number of benefits including consistent contrast and appearance over a relatively wide range of inversion recovery times (TI), improved contrast‐to‐noise ratio, and consistent size of the enhanced region. Comparison between images acquired using segmented breath‐held turbo‐FLASH and averaged, motion‐corrected, free‐breathing true‐FISP show excellent agreement of measured CNR and infarct size. In this study, motion correction was implemented using image registration postprocessing rather than navigator correction of individual frames. Navigator techniques may be incorporated as well. Magn Reson Med 53:194–200, 2005. Published 2004 Wiley‐Liss, Inc.