Comparison of the accuracy of subtraction CT angiography performed on 320-detector row volume CT with conventional CT angiography for diagnosis of intracranial aneurysms

摘要: Abstract Objective The accuracy of diagnosis intracranial aneurysms by subtraction computed tomography angiography (CTA) was compared with conventional non-subtracted CTA and digital (DSA). Methods 56 patients spontaneous subarachnoid hemorrhage (SAH) suspected were evaluated from September 2009 to January 2010. All underwent 320-detector row volume CT-CTA examinations. Non-contrast CT each patient's head the same scan range performed before routine as mask image for subtraction. data obtained subtracting data. Subtraction transmitted a VOXAR workstation two physicians experience in diagnostic imaging nervous system independently carried out post-processing judged results. Neurosurgeons endovascular treatment or surgical clipping based on information available through alone. Results In 42 patients, 51 detected DSA. On per-aneurysm basis, sensitivity 98.9% physician 1 100% 2. 93.7% 92.6% There excellent inter-observer agreement (κ = 0.84, 95% confidence interval 0.82–0.85). overall sensitivity, specificity, positive predictive negative values all 100%. 94%, 100%, 76%, respectively. Therapeutic decisions could be made images, whereas provided sufficient make therapeutic only 35 patients. Conclusion Conventional has lower detection very small adjacent skull when CTA. is an accurate tool that provides equivalent three-dimensional-DSA aneurysms.