Hou K, et al. – Researchers investigated whether dynamic volumetric computed tomography angiography (DV-CTA) is a safe and feasible option for endoleaks identified, but not classified by conventional CTA, in patients following endovascular aortic repair. The researchers randomized 24 patients with endoleaks and aneurysm sac enlargement (detected but not classified by conventional CTA) to the conventional CTA group and the DV-CTA group. These groups were compared with respect to the amount of contrast agent, radiation dosage, and changes in creatinine during the operation. DV-CTA showed accuracy comparable to that of digital subtraction angiography for classifying endoleaks. Therefore, in place of digital subtraction angiography, DV-CTA could be considered for classifying endoleaks that cannot be distinguished by conventional CTA. Also, DV-CTA improved safety among operators and patients because it substantially reduced the amount of contrast agent and the total radiation dosage.