Utility of Four-dimensional Computed Tomography Scan Following Endovasucular Aneurysm Repair

Although endovascular aneurysm repair (EVAR) has become standard care for abdominal aortic (AAA), AAA sac enlargement due to endoleaks is a big concern after mid-term follow-up. Secondary intervention planned according type of diagnosed by conventional enhanced computed tomography (CT) or ultrasonography (US). However, accurate diagnosis often difficult, which resulted in inappropriate method secondary including unnecessary exploratory laparotomy. Herein, we report usefulness four-dimensional CT (4D-CT) as the alternative diagnostic undetermined examinations. The patients who underwent EVAR our hospital from December 2007 September 2022 were subjects this study. was defined an increase diameter more than 5 mm. Conventional and US been applied determine reason following EVAR. Among them, 4D-CT considered cases concrete could not be determined A total 492 (401 men; mean age, 76.6 ± 7.9 years) follow-up duration 3.6 6.1 years. observed 79 (16.1%). performed 27 (5.5%). 20 (74.1%). Ia two (10.0%), Ib one case (5.0%), II 13 (65.0%), IIIb eight (40.0%). patients: reEVAR nine (45.0%), transcatheter arterial embolization (TAE) (40.0%), open conversion both TAE (10.0%). Relining stent grafts effective endoleak seven (87.5%) except required tertiary de novo endoleak. mostly exact even should second examination EVAR, if necessary.