Error propagation model for microscopic magnetic resonance elastography shear-wave images

Shadi F. Othman; Xiaohong Joe Zhou; Huihui Xu; Thomas J. Royston; Richard L. Magin

doi:10.1016/j.mri.2006.09.040

Error propagation model for microscopic magnetic resonance elastography shear-wave images

Shadi F. Othman, Xiaohong Joe Zhou, Huihui Xu, Thomas J. Royston, Richard L. Magin

Biological Systems Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Microscopic magnetic resonance elastography is a high-resolution method for visualizing shear waves and assessing the biomechanical viscoelastic properties of small biological samples. In this work, we used error propagation to develop a simple analytical model that relates the signal-to-noise ratio of MR magnitude images to the variance in shear-wave maps collected using gradient-echo and spin-echo phase-contrast pulse sequences. Our model predicts results for shear-wave images in phantoms, which match the experimentally observed phase variance within 8%. This model can be used to optimize MR pulse sequences for elastography studies, as well as other phase-difference techniques in MRI.

Original language	English (US)
Pages (from-to)	94-100
Number of pages	7
Journal	Magnetic Resonance Imaging
Volume	25
Issue number	1
DOIs	https://doi.org/10.1016/j.mri.2006.09.040
State	Published - Jan 2007

Keywords

Elastography
Error propagation model
Microscopic magnetic resonance elastography
Phase variance
Shear wave

ASJC Scopus subject areas

Biophysics
Biomedical Engineering
Radiology Nuclear Medicine and imaging

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10.1016/j.mri.2006.09.040

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title = "Error propagation model for microscopic magnetic resonance elastography shear-wave images",

abstract = "Microscopic magnetic resonance elastography is a high-resolution method for visualizing shear waves and assessing the biomechanical viscoelastic properties of small biological samples. In this work, we used error propagation to develop a simple analytical model that relates the signal-to-noise ratio of MR magnitude images to the variance in shear-wave maps collected using gradient-echo and spin-echo phase-contrast pulse sequences. Our model predicts results for shear-wave images in phantoms, which match the experimentally observed phase variance within 8%. This model can be used to optimize MR pulse sequences for elastography studies, as well as other phase-difference techniques in MRI.",

keywords = "Elastography, Error propagation model, Microscopic magnetic resonance elastography, Phase variance, Shear wave",

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year = "2007",

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AU - Othman, Shadi F.

AU - Zhou, Xiaohong Joe

AU - Xu, Huihui

AU - Royston, Thomas J.

AU - Magin, Richard L.

PY - 2007/1

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N2 - Microscopic magnetic resonance elastography is a high-resolution method for visualizing shear waves and assessing the biomechanical viscoelastic properties of small biological samples. In this work, we used error propagation to develop a simple analytical model that relates the signal-to-noise ratio of MR magnitude images to the variance in shear-wave maps collected using gradient-echo and spin-echo phase-contrast pulse sequences. Our model predicts results for shear-wave images in phantoms, which match the experimentally observed phase variance within 8%. This model can be used to optimize MR pulse sequences for elastography studies, as well as other phase-difference techniques in MRI.

AB - Microscopic magnetic resonance elastography is a high-resolution method for visualizing shear waves and assessing the biomechanical viscoelastic properties of small biological samples. In this work, we used error propagation to develop a simple analytical model that relates the signal-to-noise ratio of MR magnitude images to the variance in shear-wave maps collected using gradient-echo and spin-echo phase-contrast pulse sequences. Our model predicts results for shear-wave images in phantoms, which match the experimentally observed phase variance within 8%. This model can be used to optimize MR pulse sequences for elastography studies, as well as other phase-difference techniques in MRI.

KW - Elastography

KW - Error propagation model

KW - Microscopic magnetic resonance elastography

KW - Phase variance

KW - Shear wave

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Error propagation model for microscopic magnetic resonance elastography shear-wave images

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