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FIG 2. 77-year-old man with giant basilar artery aneurysm. A–C, On T2-weighted FSE image (A) (5182/99/1), a giant basilar artery aneurysm is mainly of high signal. Patency of its lumen can therefore not be assumed. Targeted MIP projection of the posterior circulation from the 3D-TOF (B) (35/6/1/20°) sequences, acquired with overlapping slabs, shows the entering vessels, only a small part of the aneurysm sac, and no exiting vessels. Aneurysm and exiting vessels are well seen on dynamic contrast-enhanced MRA sequence (C) (5/2/1/25°)
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