Objective The purpose of this study is to explore the clinical value of CT angiography( CTA) in the diagnosis of multiple intracranial aneurysms.Methods The data of CTA and DSA from 74 patients with multiple intracra-nial aneurysms from July 2011 to March 2015 were reviewed retrospectively.Results One hundred seventy-seven aneu-rysms were detected by DSA, and 175 aneurysms were detected by CTA.Among the aneurysms identified by CTA, 4 aneu-rysms were false positive and the correct detection rate of CTA was 96.6%.One hundred sixty-five aneurysms identified by CTA were confirmed by DSA and the correct diagnostic rate of CTA was 96.5%.CTA failed to detect 6 aneurysms and mis-diagnosed 10 aneurysms.Conclusions The correct detection rate and diagnostic rate of CT angiography ( CTA) in multiple intracranial aneurysms is relatively high.But previous surgery, spasm of the vessels, the size and number of aneurysms, radiologists'experience can influence the accuracy of ( CTA) in the diagnosis of multiple intracranial aneurysms, indicating that we should combine CTA with DSA to avoid the misdiagnosis and missed diagnosis.

Chronic subdural hematoma is one of the common central nervous system diseases in middle-aged and elderly people,and the incidence is increasing year by year.Drill and drain surgery is recognized as one of the effective ways to treat chronic subdural hematoma.However,there still exists a non-negligible recurrence after surgery.In addition,with the aging of the population,senior patients may have many underlying diseases.Therefore,the risk of surgery is high and some patients even have contraindications to surgery due to the long-term use of anticoagulant or antiplatelet drugs.In recent years,some progress has been made in the treatment of chronic subdural hematoma,such as oral atorvastatin can promote the absorption of chronic subdural hematoma,small-dose dexamethasone is used in the treatment of chronic subdural hematoma,neuroendoscopy-assisted treatment of segregated chronic subdural hematoma,and middle meningeal artery embolization surgery to reduce the recurrence of chronic subdural hematoma patients.Meanwhile,with the development of imaging,Computed Tomography(CT)and Magnetic Resonance Imaging(MRI)have made some progress in the diagnosis of chronic subdural hematoma.