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FIG 1. A thin-neck remnant invisible with initial DSA.
A, Oblique DSA image at the end of coil placement shows no flow in the aneurysm at left internal carotid artery (complete obliteration).
B and C, MRA images 3 days after coil placement. Closely targeted MIP to the aneurysm in a projection similar to that of the DSA (B) and MRA source image (C) show a neck remnant that is thin and relatively deep (arrows).
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