In vivo velocity vector imaging and time - resolved 1 strain rate measurements in the wall of blood 2 vessels using MRI
نویسندگان
چکیده
(1) Center for Health Engineering 5 Ecole Nationale Supérieure des Mines de Saint-Étienne 6 PECM CNRS UMR 5146 ; IFRESIS INSERM IFR 143 7 158 Cours Fauriel, 42023 SAINT-ÉTIENNE cedex 2, FRANCE 8 (2) Radiologie Centrale Hôpital nord 9 CHU de Saint Etienne 10 42055 SAINT-ÉTIENNE cedex 2, FRANCE 11 (3) Médecine Vasculaire Hôpital nord 12 CHU de Saint Etienne 13 42055 SAINT-ÉTIENNE cedex 2, FRANCE 14 (4) School of Biological Science and Medical Engineering, Southeast University, NANJING, 15 210096, CHINA 16 Abstract 17 In this paper, we present a new approach for velocity vector imaging and time-resolved measurements of strain 18 rates in the wall of human arteries using MRI and we prove its feasibility on two examples: in vitro on a phantom 19 and in vivo on the carotid artery of a human subject. Results point out the promising potential of this approach 20 for investigating the mechanics of arterial tissues in vivo. 21
منابع مشابه
In vivo velocity vector imaging and time-resolved strain rate measurements in the wall of blood vessels using MRI.
In this paper, we present a new approach for velocity vector imaging and time-resolved measurements of strain rates in the wall of human arteries using MRI and we prove its feasibility on two examples: in vitro on a phantom and in vivo on the carotid artery of a human subject. Results point out the promising potential of this approach for investigating the mechanics of arterial tissues in vivo.
متن کاملImproving 3D MR Velocity-Vector Field Mapping by Divergence-Free Image Reconstruction
Introduction Phase-contrast magnetic resonance imaging (PC-MRI) provides time-resolved 3D information of velocity fields of flowing blood in vessels. It has however been noted that system imperfections including eddy current related phase offsets, sample noise, displacement and partial volume effects can compromise the accuracy of velocity data derived from phase-contrast measurements [1]. If o...
متن کاملComparison of Velocity Vector Imaging Echocardiography With MRI in Mouse Models of Cardiomyopathy
Although 2-dimensional echocardiographic strain imaging cost-effectively and objectively quantifies ventricular wall motion, only 1 small study has directly compared strain measured with echocardiography against MRI (MRI) in mice. Using a different speckle-tracking algorithm (velocity vector imaging [VVI]), we compared circumferential (CS) and radial strain (RS) to displacement encoding with st...
متن کاملMeasurement of vessel wall strain using cine phase contrast MRI.
PURPOSE To determine the feasibility of using magnetic resonance imaging (MRI) to non-invasively measure strain in the aortic wall. MATERIALS AND METHODS Cine phase contrast MRI was used to measure the velocity of the aortic wall and calculate changes in circumferential strain over the cardiac cycle. A deformable vessel phantom was used for initial testing and in vitro validation. Ultrasonic ...
متن کاملAssessment of Reproducibility of Geometric Distortion in MRI using Phantom Measurements
Introduction: Image distortion is one of the major problems of magnetic resonance imaging (MRI) for use in 3DMRI, velocity MRI, FMRI and radiotherapy treatment planning (RTTP). It is widely known that the most obvious effect of the inhomogenity of the magnetic fields and the nonlinearity of the gradient is the Geometric Distortion of MR tomograms. In this study, the...
متن کامل