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Shear stiffness estimation using intravoxel phase dispersion in magnetic resonance elastography.

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Title: Shear stiffness estimation using intravoxel phase dispersion in magnetic resonance elastography.
Authors: Kevin J. Glaser1, Joel P. Felmlee1, Armando Manduca1, Richard L. Ehman1
Source: Magnetic Resonance in Medicine. Dec2003, Vol. 50 Issue 6, p1256-1265. 10p.
Subjects: Plasma diffusion, Tissues -- Models, Body composition models, Shear flow
Abstract: Dynamic MR elastography (MRE) is a phase-contrast technique in which the periodic shear motion of an object is encoded as variations in the phase of the reconstructed images. An alternative MRE method is presented whereby waves are depicted as intensity variations in the magnitude images due to intravoxel phase dispersion (IVPD). A theoretical framework is developed to model how the IVPD magnitude data are related to the underlying shear wave motion, and how they can be used to estimate shear stiffness. The results are shown in a series of phantom experiments to demonstrate that IVPD MRE complements phase-contrast MRE. Magn Reson Med 50:1256–1265, 2003. © 2003 Wiley-Liss, Inc. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Dynamic MR elastography (MRE) is a phase-contrast technique in which the periodic shear motion of an object is encoded as variations in the phase of the reconstructed images. An alternative MRE method is presented whereby waves are depicted as intensity variations in the magnitude images due to intravoxel phase dispersion (IVPD). A theoretical framework is developed to model how the IVPD magnitude data are related to the underlying shear wave motion, and how they can be used to estimate shear stiffness. The results are shown in a series of phantom experiments to demonstrate that IVPD MRE complements phase-contrast MRE. Magn Reson Med 50:1256–1265, 2003. © 2003 Wiley-Liss, Inc. [ABSTRACT FROM AUTHOR]
ISSN:07403194
DOI:10.1002/mrm.10641