Fig. 1.

68-year-old female with superior hypophyseal artery aneurysm.

A. Digital subtraction angiography shows superior hypophyseal artery aneurysm at C2 segment of left internal carotid artery. B. Stent-assisted coil embolization is performed with Neuroform stent (short arrows). C. Digital subtraction angiography immediately after stent-assisted coil embolization shows residual aneurysm filling (long arrow). D. 3D time of flight with 1-day interval demonstrates mild signal loss with diffuse artifactual luminal narrowing of stented segment and focal aneurysm filling (open arrow). E. 4D MR angiography on same day shows minimal signal loss of stented segment without luminal narrowing, and clearly visualizes residual aneurysm filling (arrowhead).