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Cardiac phase-resolved late gadolinium enhancement imaging

Weingaertner, Sebastian; Demirel, Oemer B; Gama, Francisco; Pierce, Iain; Treibel, Thomas A; Schulz-Menger, Jeanette; Akcakaya, Mehmet; (2022) Cardiac phase-resolved late gadolinium enhancement imaging. Frontiers in Cardiovascular Medicine , 9 , Article 917180. 10.3389/fcvm.2022.917180. Green open access

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Abstract

Late gadolinium enhancement (LGE) with cardiac magnetic resonance (CMR) imaging is the clinical reference for assessment of myocardial scar and focal fibrosis. However, current LGE techniques are confined to imaging of a single cardiac phase, which hampers assessment of scar motility and does not allow cross-comparison between multiple phases. In this work, we investigate a three step approach to obtain cardiac phase-resolved LGE images: (1) Acquisition of cardiac phase-resolved imaging data with varying T1 weighting. (2) Generation of semi-quantitative (Formula presented.) maps for each cardiac phase. (3) Synthetization of LGE contrast to obtain functional LGE images. The proposed method is evaluated in phantom imaging, six healthy subjects at 3T and 20 patients at 1.5T. Phantom imaging at 3T demonstrates consistent contrast throughout the cardiac cycle with a coefficient of variation of 2.55 ± 0.42%. In-vivo results show reliable LGE contrast with thorough suppression of the myocardial tissue is healthy subjects. The contrast between blood and myocardium showed moderate variation throughout the cardiac cycle in healthy subjects (coefficient of variation 18.2 ± 3.51%). Images were acquired at 40–60 ms and 80 ms temporal resolution, at 3T and 1.5, respectively. Functional LGE images acquired in patients with myocardial scar visualized scar tissue throughout the cardiac cycle, albeit at noticeably lower imaging resolution and noise resilience than the reference technique. The proposed technique bears the promise of integrating the advantages of phase-resolved CMR with LGE imaging, but further improvements in the acquisition quality are warranted for clinical use.

Type: Article
Title: Cardiac phase-resolved late gadolinium enhancement imaging
Location: Switzerland
Open access status: An open access version is available from UCL Discovery
DOI: 10.3389/fcvm.2022.917180
Publisher version: https://doi.org/10.3389/fcvm.2022.917180
Language: English
Additional information: © 2022 Weingärtner, Demirel, Gama, Pierce, Treibel, Schulz-Menger and Akçakaya. This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
Keywords: cardiac magnetic resonance (CMR), T1 mapping, LGE imaging, myocardial tissue characterization, magnetic resonance imaging, MRI sequence development
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science > Clinical Science
URI: https://discovery.ucl.ac.uk/id/eprint/10162961
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