Figure 2From: Cerebral blood flow quantification in the rat: a direct comparison of arterial spin labeling MRI with radioactive microsphere PET Schematic diagram of the FAIR technique. Blood flows up through the artery into the imaged slice. Two images are acquired: a selective inversion image, where spins are labeled with a 180° pulse in the selected plane and a nonselective image, where the whole volume is labeled with 180°.Back to article page