Keywords: Arterial Spin Labelling, Arterial spin labelling, Perfusion, Cerebral Blood Flow
Motivation: For velocity-selective arterial spin labeling (VSASL), a scaling factor (SIB) was recommended to correct the saturation recovery of arterial blood right before labeling. However, the SIB value needs to consider the inflow effect.
Goal(s): To account for the inflow of fresh, unsaturated spins due to the limited coverage of the transmit body coil into VSASL-based CBF quantification.
Approach: The SIB was measured using none-selective and slab-selective saturation with varied saturation times, respectively.
Results: Slab-selective saturation with a 2.0s delay yielded optimal tSNR efficiency and SIB=0.90 provided more accurate CBF estimation than a simple saturation recovery model.
Impact: To account for inflow effects, VSASL-based CBF quantification should use a slab-selective saturation with a 2.0s delay for optimal tSNR efficiency, and apply a scaling factor of 0.90 for more accurate CBF estimation than relying on the saturation recovery model.
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