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A: 3D pseudo-continuous arterial spin labeling (pcASL) pulse sequence paradigm. Presat: pre-saturation pulse; sat: saturation pulse; BS: background suppression. B: A set of cerebral blood flow (CBF) images from one 57-year old control subject with pcASL scan. The ASL perfusion image voxel size is 3.75 × 3.75 × 4 mm3. FSE acquisition: Fast Spin Echo acquisition.
