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Multi-parametric MRI as an indirect evaluation tool of the mechanical properties of in-vitro cardiac tissues

Delphine Périé-Curnier, Nagib Dahdah, Anthony Foudis and Daniel Curnier

Article (2013)

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Cite this document: Périé-Curnier, D., Dahdah, N., Foudis, A. & Curnier, D. (2013). Multi-parametric MRI as an indirect evaluation tool of the mechanical properties of in-vitro cardiac tissues. BMC Cardiovascular Disorders, 13. doi:10.1186/1471-2261-13-24
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Abstract

Background: Early detection of heart failure is essential to effectively reduce related mortality. The quantification of the mechanical properties of the myocardium, a primordial indicator of the viability of the cardiac tissue, is a key element in patient's care. Despite an incremental utilization of multi-parametric magnetic resonance imaging (MRI) for cardiac tissue characteristics and function, the link between multi-parametric MRI and the mechanical properties of the heart has not been established. We sought to determine the parametric relationship between the myocardial mechanical properties and the MR parameters. The specific aim was to develop a reproducible evaluative quantitative tool of the mechanical properties of cardiac tissue using multi-parametric MRI associated to principal component analysis. Methods: Samples from porcine hearts were submitted to a multi-parametric MRI acquisition followed by a uniaxial tensile test. Multi linear regressions were performed between dependent (Young's modulus E) and independent (relaxation times T1, T2 and T2*, magnetization transfer ratio MTR, apparent diffusion coefficient ADC and fractional anisotropy FA) variables. A principal component analysis was used to convert the set of possibly correlated variables into a set of linearly uncorrelated variables. Results: Values of 46.1 +/- 12.7 MPa for E, 729 +/- 21 ms for T1, 61 +/- 6 ms for T2, 26 +/- 7 for T2*, 35 +/- 5% for MTRx100, 33.8 +/- 4.7 for FAx10(-2), and 5.85 +/- 0.21 mm(2)/s for ADCx10(-4) were measured. Multi linear regressions showed that only 45% of E can be explained by the MRI parameters. The principal component analysis reduced our seven variables to two principal components with a cumulative variability of 63%, which increased to 80% when considering the third principal component. Conclusions: The proposed multi-parametric MRI protocol associated to principal component analysis is a promising tool for the evaluation of mechanical properties within the left ventricle in the in vitro porcine model. Our in vitro experiments will now allow us focused in vivo testing on healthy and infracted hearts in order to determine useful quantitative MR-based biomarkers.

Uncontrolled Keywords

Animals; Biomechanical Phenomena; Diffusion Magnetic Resonance Imaging; Elastic Modulus; Heart; In Vitro Techniques; Linear Models; Models, Cardiovascular; Myocardial Contraction; Nonlinear Dynamics; Predictive Value of Tests; Principal Component Analysis; Swine; Tensile Strength; Ventricular Function, Left; Cardiac muscle; Myocardium, Ventricule properties; multi-parametric MRI; Multiple regressions; principal component analysis

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
2500 Génie électrique et électronique > 2500 Génie électrique et électronique
9000 Sciences médicales > 9000 Sciences médicales
Department: Département de génie mécanique
Research Center: Non applicable
Funders: Fonds de recherche du Québec en santé, Sainte-Justine Hospital - Research Center
Date Deposited: 05 Dec 2018 16:20
Last Modified: 06 Dec 2018 01:20
PolyPublie URL: https://publications.polymtl.ca/3425/
Document issued by the official publisher
Journal Title: BMC Cardiovascular Disorders (vol. 13)
Publisher: BioMed Central Ltd
Official URL: https://doi.org/10.1186/1471-2261-13-24

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