title: Assessment of stiffness changes in the ex vivo porcine aortic wall using magnetic resonance elastography.
abstract: Magnetic resonance elastography (MRE) is a noninvasive phase-contrast technique for estimating the mechanical properties of tissues by imaging propagating mechanical waves within the tissue. In this study, we hypothesize that changes in arterial wall stiffness, experimentally induced by formalin fixation, can be measured using MRE in ex vivo porcine aortas. In agreement with our hypothesis, the significant stiffness increase after sample fixation was clearly demonstrated by MRE and confirmed by mechanical testing. The results indicate that MRE can be used to examine the stiffness changes of the aorta. This study has provided evidence of the effectiveness of using MRE to directly assess the stiffness change in aortic wall. The results offer motivation to pursue MRE as a noninvasive method for the evaluation of arterial wall mechanical properties.
authors: Radiology Department, Mayo Clinic, Rochester, MN 55905, USA.
authors: Lei
authors: L
authors: Xu
authors: Jun
authors: J
authors: Chen
authors: Meng
authors: M
authors: Yin
authors: Kevin J
authors: KJ
authors: Glaser
authors: Qingshan
authors: Q
authors: Chen
authors: David A
authors: DA
authors: Woodrum
authors: Richard L
authors: RL
authors: Ehman
mesh_terms: D000818:Animals; D001011:Aorta / Q000033:anatomy & histology* / Q000502:physiology*; D055119:Elastic Modulus / Q000502:physiology; D054459:Elasticity Imaging Techniques / Q000379:methods*; D006244:Hardness; D066298:In Vitro Techniques; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013552:Swine