• Illustrate the role of CT angiography in the pretherapeutic evaluation of aneurysms of the abdominal aorta. • Identify the measurements to be made, the anatomical and morphological criteria for the feasibility of a stent • Focus on anatomical variants to mention to ovoid per-operative complications.

Arterial aneurism is a focal and permanent dilation of the artery greater than 50% of its normal diameter with loss of parallelism of its edges. Abdominal aortic aneurysm (AAA) represents 60% of all arterial aneurysms. AAA prevalence increases with age up to 7-8% of patients over 65 years old. They are six times more common in men than in women. The major risk factors are age, smoking, family history of AAA and atherosclerosis disease. Concomitant aneurysm of the thoracic aorta is seen in 20% of...

CT Protocol: -The field of view must cover the entire aorta and the iliac axes. - Higher concentra­tions (iodine, 350–370 mg/ml) of intravenous contrast material must be used to improve diagnostic accuracy. - Rapid injection rate: the infusion rate should be at least 5 ml/sec. - Unenhanced acquisition. - Early arterial phase acquisition: Bolus tracking of the descending thoracic aorta, imaging should be triggered at 200 HU with a 64-section scanner or 230–250 HU with a 128-section scanner for the early arterial phase. - Delayed...

The management of uncomplicated abdominal aortic aneurysms involves two therapeutic options: open-surgery and endovascular repair. Aortic CT-angiography is of help in therapeutic decision-making and is the procedure of choice for a precise mapping, an accurate sizing.

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