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Fig. 3A —30-year-old woman with history of headache. Sagittal oblique 2D multiplanar reformation and 3D volume-rendered projections from contrast-enhanced MR angiography (A and C) and CT angiography (CTA) (B and D) show fusiform aneurysm at right posterior Sylvian branches (M3) measuring 4.3 x 4.2 x 9 mm (transverse x anteroposterior x craniocaudal) detected by both reviewers on contrast-enhanced MR angiography and CTA. CTA was performed with 0.35 x 0.35 x 0.8 mm voxels in 17 seconds. MR angiography was acquired with 0.7 x 0.7 x 0.8 mm voxels in 20 seconds.