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Abstract #4798

In vivo MR Elastography of mice liver: Comparison of motion encoding strategies between RF optimal control and oscillating gradients.

Tiffany Bakir Ageron1, Kevin Tse Ve Koon1, Pilar Sango-Solanas1, Eric Van Reeth1, and Olivier Beuf1
1CREATIS, Villeurbanne, France

Synopsis

Keywords: Elastography, Contrast Mechanisms, MRE, OC Pulse,Stiffness estimation

Motivation: Preclinical Magnetic Resonance Elastography (MRE) in small animal models offers valuable insights but often requires invasive methods. This study aims to develop non-invasive MRE for small animal liver examinations.

Goal(s): The specific goal is to compare conventional MEG-based MRE with OC-RARE MRE in terms of signal quality and motion encoding.

Approach: A non-invasive MRE setup was created for in vivo mouse liver studies. Both MEG and OC-RARE MRE were tested on four healthy mice.

Results: OC-RARE MRE showed superior Signal-to-Noise Ratios and improved wave visualization. Notable standard deviations highlight challenges. Nevertheless, OC-RARE MRE holds promise for small animal MRE research advancement.

Impact: hese results underscore a novel wave motion encoding strategy, offering substantial benefits for short T2 tissue studies, potentially reducing high technical error rates and fostering MRE's broader clinical application.

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