期刊
JOURNAL OF MAGNETIC RESONANCE IMAGING
卷 41, 期 4, 页码 1129-1137出版社
WILEY
DOI: 10.1002/jmri.24625
关键词
feature tracking; tagging; aortic stenosis; Cardiac MRI
资金
- British Heart Foundation [PG/07/068/2334]
- National Institute of Health Research (NIHR)
- National Institute for Health Research [PDF-2011-04-051] Funding Source: researchfish
PurposeTo determine the interstudy reproducibility of myocardial strain and peak early-diastolic strain rate (PEDSR) measurement on cardiovascular magnetic resonance imaging (MRI) assessed with feature tracking (FT) and tagging, in patients with aortic stenosis (AS). Materials and MethodsCardiac MRI was performed twice (1-14 days apart) in 18 patients (8 at 1.5 Tesla [T], 10 at 3T) with moderate-severe AS. Circumferential peak systolic strain (PSS) and PEDSR were measured in all patients. Longitudinal PSS and PEDSR were assessed using FT in all patients, and tagging in the 3T sub-group. ResultsPSS was higher with FT than tagging (21.0 1.9% versus 17.0 +/- 3.4% at 1.5T, 21.4 +/- 4.0% versus 17.7 +/- 3.0% at 3T, P < 0.05), as was PEDSR (1.3 +/- 0.3 s(-1) versus 1.0 +/- 0.3 s(-1), P = 0.10 at 1.5T and 1.3 +/- 0.4 s(-1) versus 0.8 +/- 0.3 s(-1), P < 0.05 at 3T). The reproducibility of PSS was excellent with FT (coefficient of variation [CoV] 9-10%) and good with tagging at 1.5T (13-19%). Reproducibility of circumferential PEDSR was best at 1.5T when only basal/mid slices were included (CoV 12%), but moderate to poor at 3T (29-35%). Reproducibility of longitudinal strain was good with FT (10-16%) but moderate for PEDSR (approximate to 30%). ConclusionIn patients with AS, FT consistently produces higher values compared with tagging. The interstudy reproducibility of PSS is excellent with FT and good with tagging. The reproducibility of circumferential PEDSR at 1.5T is good when only basal and mid slices are used. J. Magn. Reson. Imaging 2015;41:1129-1137. (c) 2014 Wiley Periodicals, Inc.
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