ObjectiveTo explore the effectiveness of CT angiography(CTA) in the risk assessment of intracranial aneurysm(IA), and systematically analyze its morphological features.

MethodsThe clinical data of 103 patients with IA from January 2017 to may 2019 were retrospectively analyzed.The CTA image morphology between ruptured and unruptured patients was compared, and its correlation with tumor rupture was analyzed.

ResultsAmong 103 patients, 78 cases(84 tumors) ruptured, and 25 cases(28 tumors) did not rupture.The rupture of traffic artery was mainly after IA, followed by anterior communicating artery, middle cerebral artery, anterior cerebral artery and posterior circulation, and the difference between the anterior and posterior cerebral arteries was statistically significant(P < 0.05).The differences of the tumor size, tumor location, tumor height, tumor neck width ratio(AR), tumor depth to tumor carrier artery diameter ratio(SR), area ratio(ratio of aneurysm area to tumor neck carrier artery area ratio) and number of sac between the ruptured group and non ruptured group were statistically significant(P < 0.05 to P < 01).The results of logistic regression analysis showed that the tumor size, AR, SR and area ratio were the independent risk factors of aneurysm rupture(P < 0.05).

ConclusionsCTA can clearly and accurately reflect the morphological features of intracranial aneurysms.The morphological findings such as tumor size, AR, SR and area ratio can be used as the independent evaluation indicators of IA rupture risk.