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FIG 6. Anterior communicating artery aneurysm with coil-related signal intensity loss in parent and branch vessels.
A, Axial nonenhanced MOTSA 3D TOF MRA source image obtained 8 months after treatment shows narrowing of the anterior communicating artery (arrow). No neck remnant or aneurysm recurrence was found.
B, Nonenhanced MOTSA 3D TOF MRA image shows narrowing of the anterior communicating artery (arrow) and the proximal part of both A2 segments of the anterior cerebral arteries (arrowheads).
C, Enhanced MOTSA 3D TOF MRA image shows similar narrowings as described in B.
D, DSA image shows complete occlusion of the aneurysm without narrowing of parent and branch vessels.
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