Nonlinear Inversion MR Elastography With Low-Frequency Actuation

Accelerating MR Elastography with Sparse Sampling and Low-Rank Reconstruction

Curtis L Johnson, Joseph L Holtrop, Anthony G Christodoulou, Matthew DJ McGarry, John B Weaver, Keith D Paulsen, Zhi-Pei Liang, John G Georgiadis, and Bradley P Sutton Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States, Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States, Electrical and Computer Engineering, University of I...

Low Frequency Geoacoustic Inversion Method

APPROACH Consider the simulated SW06 scenario with a “true” bottom consisting of 3 sediment layers (to­ taling 22m in depth extent – a medium thickness) where all three sediment layers are each defined by a linear sound-speed profile (and constant densities) all over a half-space (constant sound-speed and density) as seen in Fig. 1. For the inversion processing we shall (as in earlier work) ass...

MR-Elastography of the prostate using an endorectal coil for actuation - a feasibility study

Intensity speckle MR elastography

Introduction: Magnetic resonance elastography (MRE) allows the measurement of the mechanical properties of living tissue by combining shear waves and motion sensitive MRI [1]. In classical MRE, shear wave images are evaluated using an appropriate wave inversion technique for calculating an estimate of the spatial distribution of the shear modulus within the region of interest [2]. Problem: Wave...

TREMR: Table-resonance elastography with MR.

Magnetic resonance elastography (MRE) is a noninvasive method of measuring tissue compliance. Current MRE methods rely on custom-built hardware to elicit vibrations that are tracked by MR imaging. Knowledge of the wave propagation can be used to calculate the local shear stiffness of the tissue. We sought to determine whether the vibrations of the patient table that result from low-frequency sw...