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Fig 4. A, Follow-up DSA at 8 months after embolization of a large basilar artery aneurysm reveals only partial occlusion. B, 3D TOF MRA with MIP reconstruction (B) fails to show the (type 2) remnant entirely, due to flow effects that also compromise visualization of the left posterior cerebral artery. C and D, CE-MRA with MIP (C) and VR (D) reconstruction show both the artery and the residual aneurysm sac.
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