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Abstract #0799

Feasibility of Liver MR Elastography at 0.55 T

Michael Ohliger1, Cheng Hong1, Kay Pepin2, Kang Wang1, Waqas Majeed3, Pan Su3, Stephan Kannengiesser4, Jeremy Heilman2, Richard Ehman5, and Yang Yang1
1Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States, 2Resoundant Inc, Rochester, MN, United States, 3Siemens Healthineers, Malvern, PA, United States, 4Siemens Healthineers, Erlangen, Germany, 5Department of Radiology, Mayo Clinic, Rochester, MN, United States

Synopsis

Keywords: Elastography, Low-Field MRI, elastography, midfield MRI, 0.55T, liver

Motivation: Mid and low field MRI systems provide opportunities for lower cost MRI and larger bore size. MR elastography (MRE) would be an attractive capability for such systems.

Goal(s): Demonstrate the feasibility of MRE at 0.55T using both spin echo and gradient echo approaches.

Approach: 15 patients with known or suspected chronic liver disease received MRE at 0.55T using both GRE and SE-EPI derived measurements. Stiffness and measured ROI size were compared between approaches.

Results: High quality diagnostic MRE images were obtained in all patients, with good agreement in stiffness measured for GRE and SE approaches.

Impact: High-quality MRE acquisitions have been shown to be possible at 0.55T. MRE at lower fields and larger bore size is feasible, which will help make this technology accessible to a larger range of patients who need it.

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Keywords