Global and regional left ventricular myocardial deformation measures by magnetic resonance feature tracking in healthy volunteers: comparison with tagging and relevance of gender

Journal of Cardiovascular Magnetic Resonance

Research

Alison Noble¹  Harald Becher²  Aitzaz Rai³  Merzaka Lazdam⁴  Paul Leeson⁴  Daniel Augustine⁴  Adam J Lewandowski⁴  Jane Francis⁵  Stefan Neubauer⁵  Saul Myerson⁵  Steffen E Petersen⁶ 

[1] Institute of Biomedical Engineering, University of Oxford, Oxford, UK;Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Canada;Oxford Cardiovascular Clinical Research Facility, Department of Cardiovascular Medicine, John Radcliffe Hospital, University of Oxford, OX3 9DU, Oxford, UK;Oxford Cardiovascular Clinical Research Facility, Department of Cardiovascular Medicine, John Radcliffe Hospital, University of Oxford, OX3 9DU, Oxford, UK;Oxford Centre for Clinical Magnetic Resonance Research, Department of Cardiovascular Medicine, University of Oxford, Oxford, UK;Oxford Centre for Clinical Magnetic Resonance Research, Department of Cardiovascular Medicine, University of Oxford, Oxford, UK;William Harvey Research Institute, Barts and the London NIHR CVBRU, Queen Mary, University of London, London, UK;

关键词: Cardiovascular magnetic resonance;    Feature tracking;    Tagging;    Strain;    Myocardial displacement;    Myocardial velocity;   

DOI  :  10.1186/1532-429X-15-8

 received in 2012-04-23, accepted in 2013-01-08,  发布年份 2013

来源: Springer

【 摘 要 】

BackgroundFeature Tracking software offers measurements of myocardial strain, velocities and displacement from cine cardiovascular magnetic resonance (CMR) images. We used it to record deformation parameters in healthy adults and compared values to those obtained by tagging.MethodsWe used TomTec 2D Cardiac Performance Analysis software to derive global, regional and segmental myocardial deformation parameters in 145 healthy volunteers who had steady state free precession (SSFP) cine left ventricular short (basal, mid and apical levels) and long axis views (horizontal long axis, vertical long axis and left ventricular out flow tract) obtained on a 1.5 T Siemens Sonata scanner. 20 subjects also had tagged acquisitions and we compared global and regional deformation values obtained from these with those from Feature Tracking.ResultsFor globally averaged measurements of strain, only those measured circumferentially in short axis slices showed reasonably good levels of agreement between FT and tagging (limits of agreement −0.06 to 0.04). Longitudinal strain showed wide limits of agreement (−0.16 to 0.03) with evidence of overestimation of strain by FT relative to tagging as the mean of both measures increased. Radial strain was systematically overestimated by FT relative to tagging with very wide limits of agreement extending to as much as 100% of the mean value (−0.01 to 0.23). Reproducibility showed similar relative trends with acceptable global inter-observer variability for circumferential measures (coefficient of variation 4.9%) but poor reproducibility in the radial direction (coefficient of variation 32.3%). Ranges for deformation parameters varied between basal, mid and apical LV levels with higher levels at base compared to apex, and between genders by both FT and tagging.ConclusionsFT measurements of circumferential but not longitudinally or radially directed global strain showed reasonable agreement with tagging and acceptable inter-observer reproducibility. We record provisional ranges of FT deformation parameters at global, regional and segmental levels. They show evidence of variation with gender and myocardial region in the volunteers studied, but have yet to be compared with tagging measurements at the segmental level.

【 授权许可】

Unknown   
© Augustine et al.; licensee BioMed Central Ltd. 2013. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.