1. Cardiovascular magnetic resonance feature-tracking assessment of myocardial mechanics: Intervendor agreement and considerations regarding reproducibility.
- Author
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Schuster, A, Stahnke, V-C, Unterberg-Buchwald, C, Kowallick, J, Lamata, P, Steinmetz, M, Kutty, S, Fasshauer, M, Staab, W, Sohns, J, Bigalke, B, Ritter, C, Hasenfuß, G, Beerbaum, P, and Lotz, Jeffrey
- Subjects
Adult ,Cardiotonic Agents ,Dobutamine ,Female ,Healthy Volunteers ,Humans ,Image Interpretation ,Computer-Assisted ,Magnetic Resonance Imaging ,Cine ,Male ,Middle Aged ,Reproducibility of Results ,Software - Abstract
AIM: To assess intervendor agreement of cardiovascular magnetic resonance feature tracking (CMR-FT) and to study the impact of repeated measures on reproducibility. MATERIALS AND METHODS: Ten healthy volunteers underwent cine imaging in short-axis orientation at rest and with dobutamine stimulation (10 and 20 μg/kg/min). All images were analysed three times using two types of software (TomTec, Unterschleissheim, Germany and Circle, cvi(42), Calgary, Canada) to assess global left ventricular circumferential (Ecc) and radial (Err) strains and torsion. Differences in intra- and interobserver variability within and between software types were assessed based on single and averaged measurements (two and three repetitions with subsequent averaging of results, respectively) as determined by Bland-Altman analysis, intraclass correlation coefficients (ICC), and coefficient of variation (CoV). RESULTS: Myocardial strains and torsion significantly increased on dobutamine stimulation with both types of software (p
- Published
- 2015