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Abstract #2996

Free Breathing Multiple Delays Renal Perfusion MRI using Hadamard encoded pCASL

Naoyuki Takei1, Shota Ishida2, Nobuyuki Kosaka3, R Marc Lebel4, Yuki Matta2, Hirohiko Kimura3, and Hiroyuki Kabasawa1

1Global MR Applications & Workflow, GE Healthcare, Tokyo, Japan, 2Radiological Center, University of Fukui Hospital, Fukui, Japan, 3Department of Radiology, University of Fukui, Fukui, Japan, 4Global MR Application & Workflow GE Healthcare, Calgary, AB, Canada

Current pCASL renal perfusion imaging is typically restricted to a single post label delay (PLD) time. While multiple PLD (mPLD) times can be achieved with sequential scans with different PLD times, this procedure is time consuming. A rapid acquisition was developed using Hadamard encoding for mPLD pCASL imaging combined with a motion robust timing and readout strategy to permit free breathing renal ASL. The feasibility study explores the application of Hadamard encoding to renal perfusion imaging where spin labeling is affected by pulsatile flow and demonstrated that a cardiac triggered scan provided stable perfusion images achieving ATT corrected renal blood flow with seven PLD acquisition

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