*Discrepancies between the left and right side regarding contrast filling of arteries. Direct comparisons can be made between stems of major arteries, while for lesser branches it is enough to compare the overall artery coverage in cerebral and cerebellar volumes.
*Obvious aneurysms
===Report===
*Significant anatomical variants, such as left-right discrepancies circle of Willis and its supplying arteries.
Normal report: ''Normal contrast filling of the major intracranial vessels''.
==Diseases==
*[[CT angiography of the head for stroke]]
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