Abstract: Objective:To explore the diagnosis evaluation of DSCT with boneless subtraction 3D-CTA in cerebral on;3D-CTA;cerebral vascular disease vascular disease.Methods:DSCT with boneless subtraction 3D-CTA of 60 patients with suspected clinically cerebral vascular diseases were analyzed retrospectively all axial images were transferred to an external workstation.The reconstructed images were processed into volume rendering (VR),multiplanar reconstruction (MPR) and maximum intensity projection (MIP),the values were valuably compared with the results of surgery or DSA.Results:9 cases were aneurysms,29 cases were cerebral artery stenos is or occlusion,3 cases were AVM,19 cases were normal.Conclusion:DSCT with boneless subtraction 3D-CTA is a valuable diagnostic method for various cerebral vascular diseases.