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Abstract #0477

Transient shear wave elastometry using a portable magnetic resonance sensor

William Selby1, Phil Garland2, and Igor Mastikhin1
1Physics, University of New Brunswick, Fredericton, NB, Canada, 2Mechanical Engineering, University of New Brunswick, Fredericton, NB, Canada

Synopsis

Keywords: Low-Field MRI, Elastography, Portable magnetic resonance, transient elastometry

Motivation: Magnetic resonance elastography (MRE) is a powerful tool for quantifying tissue elasticity but typically requires costly MRI scanners, highlighting the need for accessible methods.

Goal(s): We aim to develop methods for quantifying elasticity using compact, portable magnetic resonance instruments for specific, targeted applications.

Approach: We use a portable magnet array with a sensitive region 2 cm from the magnet surface to monitor shear wave propagation via phase-interference-induced signal changes, relating pulse travel time to wave speed and shear modulus.

Results: We have demonstrated that our method distinguishes the elasticity of different tissues and provides quantitative measurements closely matching those obtained with optical methods.

Impact: In this study, we demonstrate that simple, compact magnetic resonance instruments can effectively and quantitatively characterize tissue elasticity. These methods can be used with specific, purpose-built instruments that can be employed in high-impact areas as valuable tools for routine monitoring.

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