ASL has emerged as a non-invasive tool for measuring renal perfusion. Whereas in the brain consensus leans towards pCASL as the preferred labeling strategy, in the kidney PASL-FAIR has been reported on most. A systematic comparison of renal PASL-FAIR and pCASL perfusion measurement was performed at 3T in 16 volunteers, with separate visits to assess repeatability. PASL-FAIR perfusion values were significantly higher than those obtained with pCASL. Moreover, at 3T PASL-FAIR had approximately 2-3 times better repeatability compared to pCASL.
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