Detection of intracranial aneuryslm with dual-source CT angiography： comparison with digital subtraction angiography

Abstract

Objective To evaluate the diagnostic value of dual-source CT angiography （DSCTA） for intracranial aneurysms. Methods The data of DSCTA and digital subtraction angiography （DSA） were collected from 95 patients with subarachnoid hemorrhage （SAH）. The efficacies of detection and description of morphologic features of intraeranial aneurysms were analyzed retrospectively. Results A total of 117 aneurysms in 88 patients were detected with DSCTA. Two patients were suspected of having aneurysms, and no aneurysms were detected in 5 patients. These patients were reexamined with DSA, 4 were diagnosed as having aneurysm, and the aneurysms were not detected in 3 patients. DSA results were considered as gold standard, the specificity, sensitivity and accuracy of DSCTA for the detection of intracranial aneurysms were 100%, 96. 7% and 96. 8%, respectively. The larger volume of intraeranial aneurysm was, the higher the sensitivity of DSCTA diagnosis would be. Even for small aneurysms, the sensitivity of DSCTA diagnose was more than 90%. In addition, tmeasurement results of the maximum diameter and neck width of aneurysms measured by DSCTA were almost consistent with DSA. Conclusions SCTA is a non-invasive, quick, reliable, and effective method, and can provide accurate imaging information for surgery. The specificity and sensitivity of the diagnosis of aneurysms with DSCTA are almost the same with DSA. It has more advantages than DSA in the emergency operation of intracranial aneurysms. Key words: Intracranial Aneurysm; Subarachnoid Hemorrhage; Tomography, X-Ray Computed; Cerebral Angiography; Angiography, Digital Subtraction