Transient shear wave elastometry using a portable magnetic resonance sensor

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.