Assessment of Mechanical Properties of Muscles from Multi-Parametric Magnetic Resonance Imaging
Assessment of Mechanical Properties of Muscles from Multi-Parametric Magnetic Resonance Imaging作者机构：Mechanical Engineering Department Ecole Polytechnique de Montréal Montreal Canada Notre Dame Hospital University of Montreal Montreal Canada Philips Healthcare Montreal Canada Research Center Sainte-Justine University Hospital Montreal Canada
出 版 物：《Journal of Biomedical Science and Engineering》 (生物医学工程（英文）)
年 卷 期：2014年第7卷第8期
页 面：593-603页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Muscles Mechanical Properties Multi-Parametric MRI Multiple Regressions Principal Component Analysis
摘 要：We hypothesized that a relationship existed between the mechanical properties and the magnetic resonance imaging (MRI) parameters of muscles, as already demonstrated in cartilaginous tissues. The aim was to develop an indirect evaluation tool of the mechanical properties of degenerated muscles. Leg and arm muscles of adult rabbits were dissected, and tested 12 hours post mortem, in a state of rigor mortis, or 72 hours post mortem, in a state of post-rigor mortis. The tests consisted of a multi-parametric MRI acquisition followed by a uniaxial tensile test until failure. The statistical analysis consisted of multiple linear regressions and principal component analysis. Significant differences existed between the rigor mortis and post-rigor mortis groups for E but not for the MRI parameters. 78%, 60% or 33% of the Young’s modulus could be explained by the MRI parameters in the post-rigor mortis group, rigor mortis group or both groups respectively. These relationships were confirmed by the principal component analysis. The proposed multi-parametric MRI protocol associated to principal component analysis is a promising tool for the indirect evaluation of muscle mechanical properties and should be useful to find biomarkers and predictive factors of the evolution of the pathologies.
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