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Voxelwise joint histograms (34 × 30 bins) of ASL versus [15O]H2O PET CBF of intracranial (top) and gray matter (bottom) intensity normalized group-averaged maps. AccASL, acceleration-selective arterial spin labeling; CBF, cerebral blood flow; pCASL, pseudo-continuous ASL; PET, positron emission tomography; VS-ASL, velocity-selective ASL.
