Figure 1.

Representative patient case. The first row of images shows different levels of perfusion relative to the maximum perfusion level in the brain (occipital lobe in ethyl cysteinate dimer, ECD). In the second row of images, we compare the patient to the average of normal scans in the database. Hypoperfusion is in blue, and hyperperfusion is in red; only pixels >2 standard deviations from normal are shown. In the third and 4th rows of images, we represent the positive and negative Z-scores, which outline the regions of heightened and diminished perfusion relative to control.