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Abstract #4743

Comparison of Respiratory Motion Artifacts in T1-Weighted Liver Magnetic Resonance Imaging using End-expiration and End-inspiration Breath-Holds

Kim Nhien Vu1, Albert Tae-Hun Roh1, Anshul Haldipur2, Peter Lindholm1, and Andreas Markus Loening1

1Department of Radiology, Stanford University, Stanford, CA, United States, 2Department of Radiology, Dignity Health Medical Foundation, San Francisco, CA, United States

Respiratory motion artifact is a common pitfall in MRI of the liver and no standard of practice currently exists for breath-hold imaging techniques. This retrospective observational study compared image quality between end-inspiration and end-expiration breath-holding techniques. Precontrast T1-weighted 3D spoiled gradient recalled echo imaging of the liver obtained using the two techniques were compared in 50 consecutive subjects, along with postcontrast sequences in a subset of 47. Three radiologists performed blinded evaluations of respiratory motion in the sequences. Breath-holding technique at end-expiration was significantly better at reducing respiratory motion artifacts, yielding fewer images of nondiagnostic quality than end-inspiration breath-holding technique.

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