|author2=
}}
==ApproachPlanning=====Alternative investigations===[[Magnetic resonance angiography of the head]] is indicated in:*Less emergent situations, since it is generally less readily available.*Contraindications to intravenous contrast, since it can visualize cerebral vessels without it. ===Constructions===
Aneurysms are more readily visualized by thick slices such as 15mm, but thin slices such as 1.2 mm still need to be observed if there may be a focal occlusion or stenosis.
{{Bottom}}