The value of CT venography in the surgical treatment of falcotentorial junction meningioma / 中华放射学杂志

Objective To explore the value of CT venography in the surgical treatment of falcotentorial junction meningiomas. Methods CT venography was carried out in 25 patients with falcotentorial junction meningiomas. 2-D and 3-D images were reformatted at the workstation. The classification and relationship between the tumors and veins were determined, and the degree of venous stenosis and collateral were assessed. The safe surgical pathway was chosen to avoid the injury of main draining vein. Results Falcotentorial junction meningiomas were divided into 5 types according to the relationship between the tumors and veins and the direction of the tumors. There were 5 cases of forward type, 4 cases of backward type, 3 cases of inferior type, 6 cases of superior type and 7 cases of lateral type in this group. The relationship between tumors and veins was accordant with the findings in surgery. Of all 25 cases, 19 underwent total removal, 6 underwent subtotal removal and all of the main driving veins were reserved. There were 3 cases of quadrantanopsia or hemianopsia after the operation, and all of them recovered after 3 months of follow-up. Conclusion CTV technique can classify the falcotentorial junction meningioma and is helpful for choosing the appropriate surgical approaches.

Value of CT venography in diagnosis of cerebral venous sinus thrombosis / 临床神经病学杂志

Objective To explore the value of CT venography (CTV) in diagnosis of cerebral venous sinus thrombosis (CVST) . Methods 16 patients with CVST were examined by CTV. 2D and 3D vascular images were reconstructed through workstation. Results Filling-defect was seen as "empty triangle sign" on the axial image.Multiple CVST were displayed in 11 patients,among them,8 cases involved superior sagittal sinus,3 cases involved lateral sinus. Single CVST was displayed in 5 patients,2 cases involved superior sagittal simes,2 cases involved straight sinus,1 case involved inferior sagittal sinus. The irregular narrowing or occlusion of the sinus and dilation of the branch of vein were observed in all 16 patients on 2D or 3D images. Hydrocephalus, cerebral infarction and cerebral hemorrhage were seen in 11 cases, 6 cases and 4 cases respectively. Conclusion CTV is a sensitive and distinctive technique in diagnosing CVST.