3D-CT angiography with volume rendering technique in the intracerebral aneurysms

Purpose: Many techniques of 3D reconstruction (MIP, SSD) permit a good eval uation of the circle of Willis in order to detect cerebral aneurysms. More recently, the advent in the clinical pratice of a calculation algorihm (VRT ) adapted to the workstations for images treatment seems to improve evaluat ion of the characteristics regarding these aneurysms. Materials and methods: We report 4 cases with cerebral aneurysms studies wi th CT-angiography using the technique MIP and VRT. Results: The VRT, using the totality of image informations, allows a better understanding than MIP about the intracranial cerebral aneurysms including their constitution and 3D localization. Conclusion: The VRT reconstruction permits to obtain quickly good quality a nd reproductive images, without relationship with threeshold.