Application of dual-energy CT angiography in the follow-up of clipped intracranial aneurysm

Objective To assess the value of dual-energy CT angiography(DECTA) in the follow-up of postoperative intracranial aneurysms.Methods Seventy-seven patients diagnosed as intracranial aneurysm and underwent implemented aneurysm clipping with titanium clips were enrolled.The raw data of CTA were acquired and transmitted to the workstation for image post-processing.Comprehensive analysis and evaluation was made on original axial images and reconstructed images.Results DECTA of 77patients was all clearly showed the aneurysm,clips and the patency of parent artery.Among 84aneurysms,there were 82aneurysms completely occluded without shifting,2with residual aneurysm neck.Among 77 patients,new aneurysms of the other part were detected in 3patients after clipping,while slight stenosis of aneurysm carrying artery was noticed in 1patient.Conclusion DECTA can be used as an accurate and noninvasive method for postoperative follow-up for patients with aneurysms after clipping with titanium clips.