To present the CT angiography (CTA) findings of pre and post-operative complications of abdominal aortic aneurysms (AAA),
with which radiologists should be familiar.
Definition: Abdominal aortic aneurysm (AAA) is considered pathologic dilatation of the abdominal aorta,
greater than 50% of the normal proximal segment or a dilatation more than 3 cm in the greatest diameter. Pathogenesis: it is multifactorial comprising environmental,
It can lead to intimal injury,
with lipid-laden macrophages and lymphocyte infiltration of the aortic wall.
The latter being the histopathological background of atherosclerosis. Complications of AAA:...
Findings and procedure details
CT PROTOCOL -Unenhanced CT Best for the depiction of hyperdense blood products,
It may be adjunct in problem-solving (helping to differentiate between stent,
graft margins and contrast leak versus calcification) when appropriate windowing in the CECT is not helpful or equivocal. -Arterial-phase CT after IV contrast either at 25sec or using automated software,
(total injected volume 80-140 ml, flow rate 3.5-4.5 ml/sec),
depending on CT scanner,
and patient's body habitus. -Delayed...
CTA is the gold standard for the investigation of patients in whom either pre- or postoperative complications of AAA are suspected. Radiologists must be aware of these complications and alert,
in order to recognize the wide spectrum of these abnormalities.
Dr Eleni Arvaniti Resident in training.
Department of Radiology,
General University Hospital of Patras,
Greece E-mail: email@example.com
Abdominal aortic aneurysm in 4,237 screened patients: prevalence,
development and management over 6 years.Br J Surg 1991; 78:1122–1125. •Arita T,
Abdominal aortic aneurysm: rupture associated with the high-attenuating crescent sign.Radiology 1997; 204:765–768. •Stavropoulos SW,
Imaging techniques for detection and management of endoleaks after endovascular aortic aneurysm repair.