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FIG 5. Disagreement between MRA and DSA on the occlusion status of a posterior inferior cerebellar artery aneurysm 14 months after treatment with coils.
A, DSA image obtained immediately after coiling shows a small area of residual filling (arrow).
B, Nonenhanced MOTSA 3D TOF MRA image obtained 14 months after treatment shows flow in the aneurysm neck (arrow), which was interpreted as a 2-mm remnant by both observers.
C, DSA image shows filling of the aneurysm neck (arrow), which was interpreted as a 2-mm recurrence (including a 1-mm remnant) due to coil compaction. Both observers thought that additional treatment for this small recurrence was not indicated.
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