The value of CT angiography in diagnosis of intracranial aneurysms

Abstract

Objective To study the application value of multislice spiral CT angiography(MSCTA)in diag-nosis of intracranial aneurysms. Methods MSCTA was used to diagnose intracranial aneurysms in 40 patients with subarachnoid hemorrhage. Subtraction angiography digital（DSA）was used as the gold standard to evaluate the sensi-tivity，specificity and accuracy of MSCTA for diagnosis of intracranial aneurysms. Results In 40 patients,34 aneu-rysms were detected in 32 patients and they were all confirmed by incarceration of aneurysm. The aneurysms were detected in 33 cases by MSCTA, and the aneurysms were 34.Most of them were single(31 cases),1 case was multiple and 1 case was false positive. DSA was detected in 32 patients with 34 aneurysms, but single in 30 cases and multiple in 2 cases. DSA as the gold standard, the sensitivity, specificity and accuracy of MSCTA in diagnosis of intracranial aneurysms were 100%,87.50% and 97.50% respectively. MSCTA detected aneurysm neck width 1.85-4.33mm, average aneurysm neck width was(3.65±1.85)mm.DSA detected aneurysm neck width 1.52-4.48mm, average aneurysm neck width was(3.41±1.96)mm. The average tumor neck width detected by the two methods had no sta-tistically significant difference(t＝0.78,P＞0.05). But from the minimum of the detection, DSA still had certain advantages. Conclusion The sensitivity of MSCTA for intracranial aneurysmswas high. It can be used as a method for surgical treatment of intracranial aneurysms, but it still can not completely replace the DSA. Key words: CT angiography angiography; Digital subtraction angiography; Intracranial aneurysms