Application of 16-slice Spiral CT Angiography in the Spontaneous Subarachnoid Hemorrhage

【Objective】 To evaluate the value of 16-slice computed tomography angiography(MSCTA) in finding the etiology of spontaneous subarachnoid hemorrhage(SAH). 【Methods】 Thirty eight patients with acute spontaneous SAH undergoing CTA were reviewed.All patients received 16-MS CTA and digital subtraction angiography(DSA) simultaneously.The data were reconstructed by using volume rendering(VR),maximum intensity projection(MIP) and surface shadow display(SSD).The quality of the reconstructions was compared with digital subtraction angiography(DSA)and surgical findings.【Results】 Among 38 patients,7 were arteriovenous malformation,23 were cerebral aneurysm.Among 23 patients,21 had solitary aneurysm,one had two aneurysms and one had an aneurysm and an arteriovenous malformation together.The diameters of the aneurysms were from 2.0mm to 20mm.The body of aneurysms(including morphology,outline and the develop orientation) was demonstrated on MSCTA,and the characteristics of the aneurysm including neck size,width, the relationship to surrounding vessels and its space relationship with the skull were also well displayed.There were 25 aneurysms identified by DSA.Accuracy rate of CTA in diagnosing aneurysm was 96%(24/25).【Conclusion】16-MSCTA is a high accurate method in diagnosing intracranial aneurysm and helpful to find the etiology for SAH,and provides the information for clinical treatment.