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Abstract #1782

Super high temporal frame rate reconstruction in abdominal dynamic contrast-enhanced MRI using stack-of-stars acquisition (LAVA-Star) under free breathing toward comprehensive hemodynamic analysis of the abdominal vessels and organs: a feasibility study

Tetsuya Wakayama1, Daiki Tamada2, Kang Wang3, Ty Cashen3, Ali Ersoz4, Shintaro Ichikawa2, Hiroshi Onishi2, and Utaroh Motosugi2

1MR Collaboration and Development, GE Healthcare, Hino, Japan, 2Radiology, University of Yamanashi, Chuo, Japan, 3MR Collaboration and Developement, GE Healthcare, Madison, WI, United States, 4MR Engineering, GE Healthcare, Waukesha, WI, United States

We demonstrated the feasibility of breath hold-free dynamic MRI of the liver using stack-of-stars acquisition with super high temporal frame rate (0.5s/phase) reconstruction. Stack-of-stars acquisition with soft gating technique enabled to acquire sufficient quality of dynamic MRI without breath-holdings. The super high frame rate reconstruction provided the better time-intensity curves, which enabled to capture accurate time-to-peak enhancement of each vessel, a second bolus pass in the aorta, and the peak delay from splenic vein to main portal vein. This technique is feasible for the comprehensive understandings of hemodynamics in arterial and portal venous circulation and abdominal organs.

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