FIG 2. Subject 7, 4-week implantation.

A, DSA obtained image before embolization. The aneurysm is 4.9 x 5.1 x 6.5 mm (width x neck size x length).

B, DSA image obtained immediately after embolization depicts 95% occlusion.

C, Angiogram obtained before euthanasia and 4 weeks after coil implantation shows no change.

D, Photomicrograph reveals mostly unorganized blood filling the aneurysmal cavity and a thin fibrin rim covering the coils (arrows) (hematoxylin-eosin stain, original magnification x6.3). The neck of the aneurysm is covered with thin fibrin rim (arrowheads).