AJDRAJNR - American Journal of Neuroradiology

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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.





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Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X