Click on image to view larger version.



FIG 3. Differences in rCBF between groups according to Cognard angiographic classification.

A, Resting rCBF significantly differs between type I and types III and IV.

B, After acetazolamide challenge, rCBF significantly differs, even between type I and type II.

C, Increase in rCBF due to acetazolamide ({Delta}F, or acetazolamide value minus resting value) is significantly different between type I and the other types.