Figure 1.

Illustration of the morphological parameters Hmax, Wmax, Hortho, Wortho and Dmax (a). The semi-automatically determined neck curve separates the aneurysm from the parent vessel surface mesh and area AA and volume VA of the aneurysm sac are extracted (b). The surface area of the ostium is extracted for the reconstructed neck curve (OA1) as well as for the projected neck curve (OA2) (c). The angle-related parameters account for the tilting of the aneurysm (d–f). Even if the aspect ratio is identical, γ and ∆αβ differ (e, f).²⁷

A_A, Surface area of the aneurysm.

D_max, Maximum diameter of the aneurysm.

H_max, Maximum height of the aneurysm.

H_ortho, Height of the aneurysm, measured vertically to the aneurysm neck.

V_A, Volume of the aneurysm.

W_max, Maximum width perpendicular to H_max.

W_ortho, Maximum width perpendicular to H_ortho.