FIG 3. Images in a patient with right middle cerebral artery occlusion. Note the linear high-signal intensity areas (arrows) along the major sulci at right temporoparietal regions; these may represent collateral flow or vessels with notably delayed flow.

A, Pre-acetazolamide ¹²³I-IMP image.

B, Pre-acetazolamide FAIR image obtained with a TI of 1200 milliseconds.

C, Pre-acetazolamide FAIR image obtained with a TI of 1400 milliseconds.

D, Post-acetazolamide ¹²³I-IMP image.

E, Post-acetazolamide FAIR image obtained with a TI of 1200 milliseconds.

F, Post-acetazolamide FAIR image obtained with a TI of 1400 milliseconds.