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Abstract #0322

Utility of Stack-of-stars Acquisition for Arterial Phase Imaging without Breath-holding on Dynamic MRI of the Liver

Shintaro Ichikawa1, Daiki Tamada1, Tetsuya Wakayama2, Sagar Mandava3, Ty A Cashen4, Hiroshi Onishi1, and Utaroh Motosugi1
1Department of Radiology, University of Yamanashi, Chuo, Japan, 2MR Collaboration and Development, GE Healthcare, Hino, Japan, 3MR Collaboration and Development, GE Healthcare, Tucson, AZ, United States, 4MR Collaboration and Development, GE Healthcare, Madison, WI, United States

We compared arterial phase (AP) images using conventional (Cartesian) breath-hold liver acquisition with volume acceleration (LAVA) and stack-of-stars acquisition without breath-holding (LAVA-Star) on hepatic dynamic MRI. In Cartesian breath-hold LAVA group, 8.7% of patients showed inadequate scan timing of AP, while only 1 patient (4.0%) in LAVA-Star group (12 s/phase) showed inadequate scan timing. One advantage of LAVA-Star was that the adequate scan timing of AP can be obtained by using additional high frame rate reconstruction (3 s/phase) in the patient with inadequate scan timing in routine reconstruction. LAVA-Star was useful to obtain adequate scan timing in all patients.

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