Fig. 4.

Endovascular treatment groups. Selected frames of angiographic series showing aneurysms before (A,E,I,M), immediately after (B,F,J,N), and 3 months after treatment (C,G,K,O), and photographs of the aneurysm ostium (D,H,L,P) in animals treated by coiling (A–D), single stent–assisted coiling (E–H), Y-stent-assisted coiling (I–L), and Y-stenting (M–P) showing recurring aneurysm with simple coiling (asterisk in C), better results with stent-assisted coiling, and the absence of therapeutic effect with Y-stenting only (asterisk in O). N was taken at the end of the angiographic series, to show the Y disposition of stents.