Fig. 2From: Dynamic evaluation of unruptured intracranial aneurysms by 4D-CT angiography: comparison with digital subtraction angiography (DSA) and surgical findingsCriteria for identifying aneurysmal pulsation: Twenty frames corresponding to the twenty phases in the R-R interval of a single cardiac cycle were acquired. Elevation in a part of the aneurysm was observed in at least three successive framesBack to article page