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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