Diagnostic Value of 16-Slice Spiral CT Angiography for Intracranial Aneurysm

Objective:To evaluvate the 16-slice spiral CT angiography (CTA) in the diagnosis of intracranial aneurysm.Methods:16 patients with clinically suspected intracranial aneurysm were evaluated by 16-slice spiral CTA,8 cases underwent digital subtraction angiography (DSA) simultaneously.Maximal intensity projection (MPR) and volume rendering (VR) images were obtained by reconstruction. Results:Of the 16 patients,17 aneurysms were detected by CTA.One patient had multiple (n=2) and the others had solitary aneurysm.The aneurysms were mainly round or oval in shape (n=15),the others were bean shape (n=2),rosary shape and gourd shape for one case each.The largest one was 18mm and the smallest one was 1.5mm in diameter.Of the 8 patients having DSA,the DSA findings were the same as that of CTA in 7 patients;in one patient,the aneurysm was missed by DSA.Conclusion:16-slice spiral CT angiography is an accurate,rapid and noninvasive method for detecting intracranial aneurysm,especially in the emergency situation,some additional important information can be provided for DSA.