| Aneurysm Diameter | Imaging Interval |
| <3.0 cm | No explicit recommendation is made |
| 3.0-3.5 cm | 6 month follow-up initially with cross-sectional imaging; if stable, repeat scanning annually |
| >3.5 cm | Close follow-up or expeditious treatment |
- “Aneurysms that are <3.0 cm in diameter tend to be asymptomatic, rarely rupture, and expand slowly.”
- “Iliac artery aneurysms >3.5 cm have a greater tendency to rupture.”
Reference: Khosa F, Krinsky G, Macari M, Yucel EK, Berland LL. Managing Incidental Findings on Abdominal and Pelvic CT and MRI, Part 2: White Paper of the ACR Incidental Findings Committee II on Vascular Findings. J Am Coll Radiol 2013;10:789-794.
