Investigation of Clinical Application Using Fusion Imaging Combined CTA with DSA-DYNA-CT in the Endovascular Prosthesis for Abdominal Aortic Aneurysm

Objective:To evaluate the DSA 3D-roadmap in the endovascular prosthesis for abdominal aortic aneurysm with the fusion image of CT angiography(CTA) and DSA-DYNA-CT.Methods:Fifteen patients with abdominal aortic aneurysm were enrolled in the study.Aortic CTA and DSA-DYNA-CT imaging were performed to the fusion imaging in the workstation with the software of syngo inspace 3D fusion for the abdominal aortic aneurysm without contrast medium administration.Then the fusion image was used as the 3D-roadmap in the process of real-time fluoroscopy.Results: In the fusion process of CTA and DYNA-CT,osseous paraposition were 2 mm in 10 cases,3 cases 2-5 mm,2 cases 2 mm in 5 cases,but the osseous registration can be satisfied with the manual adjustment(2mm).Due to the influence of the stent delivery devices,the abdominal aorta has marked displacement.Displacement was more than 2 mm between up and down in 7 cases(7/15,46.7%),and displacement was greater than 2 mm between left and right in 10 patients(10/15,66.7%).Conclusions: Without contrast medium administration,the 3D-roadmap,can be used to guide wire and to observe the stent position during the treatment of abdominal aortic aneurysm.