𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A simple measure of flow disorder and wall shear stress in phase contrast MRI

✍ Scribed by James G. Pipe

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
433 KB
Volume
49
Category
Article
ISSN
0740-3194

No coin nor oath required. For personal study only.

✦ Synopsis

A method for estimating the standard deviation of velocity within a voxel is proposed. This estimate is based on data collected using a phase-contrast MRI technique. Simulations are presented to characterize the estimate and in vivo data are shown. Several different uses of the estimate are proposed, including obtaining a measure of wall shear stress, aiding in data combination from different phase-contrast MRI datasets, and mitigation of flow void artifacts.

📜 SIMILAR VOLUMES

MRI measurement of wall shear stress vec
MRI measurement of wall shear stress vectors in bifurcation models and comparison with CFD predictions
✍ Uwe Köhler; Ian Marshall; Malcolm B. Robertson; Quan Long; X. Yun Xu; Peter R. H 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 497 KB

## Abstract Steady fluid flow was studied in a simple bifurcation model and in a physiologically realistic model of the human carotid bifurcation. Wall shear stress (WSS) vectors were calculated from phase‐contrast (PC) magnetic resonance imaging (MRI) measurements of the velocity field. Velocity m

Spatial and spectral heterogeneity of ti
Spatial and spectral heterogeneity of time-varying shear stress profiles in the carotid bifurcation by phase-contrast MRI
✍ Bradley D. Gelfand; Frederick H. Epstein; Brett R. Blackman 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 483 KB

## Abstract ## Purpose To determine the heterogeneity of the time‐varying shear stress profiles in the human carotid bifurcation, a region prone to atherosclerosis. ## Materials and Methods Lagrangian bicubic interpolation of phase‐contrast MRI images was used to determine the shear stress profi

Quantitative phase-contrast flow MRI mea
Quantitative phase-contrast flow MRI measurements in the presence of a second vessel closely positioned to the examined vessel
✍ Kerstin M. Lagerstrand; Barbro Vikhoff-Baaz; Göran Starck; Eva Forssell-Aronsson 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 464 KB

## Abstract ## Purpose To examine the influence of the truncated sampling of __k__‐space data on the accuracy of phase‐contrast (PC) flow quantifications in the presence of nearby vessels. ## Materials and Methods Computer simulations were performed along with some experimental validations on a

Quantification of vessel wall motion and
Quantification of vessel wall motion and cyclic strain using cine phase contrast MRI: In vivo validation in the porcine aorta
✍ Mary T. Draney; Frank R. Arko; Marcus T. Alley; Michael Markl; Robert J. Herfken 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 454 KB

## Abstract Artery wall motion and strain play important roles in vascular remodeling and may be important in the pathogenesis of vascular disease. In vivo observations of circumferentially nonuniform wall motion in the human aorta suggest that nonuniform strain may contribute to the localization o

Reproducibility of wall shear stress ass
Reproducibility of wall shear stress assessment with the paraboloid method in the internal carotid artery with velocity encoded MRI in healthy young individuals
✍ Frieke M.A. Box; Rob J. van der Geest; Jeroen van der Grond; Matthias J.P. van O 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 204 KB

## Abstract ## Purpose To verify whether wall shear stress (WSS) can be assessed in a reproducible manner using automatic model‐based segmentation of phase‐contrast MR images by determination of flow volume and maximum flow velocity (Vmax) in cross‐sections of these vessels. ## Materials and Meth