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Updated: Jul 9, 2026
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Improved Registration of 3D CT Angiography with X-ray Fluoroscopy for Image Fusion During Transcatheter Aortic Valve Implantation
Published on: June 3, 2018
[Flat-panel CT as a new perinterventional imaging modality in aortic stentgraft procedures--work in progress].
1Institut für diagnostische und interventionelle Radiologie, LKH Klagenfurt, St. Veiterstrasse 47, Klagenfurt. egon.rabitsch@lkh-klu.at
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|December 7, 2007
Summary
Flat-panel CT (FP-CT) shows aortic stentgrafts well after endovascular repair. While promising for aortic aneurysm procedures, further studies are needed to confirm its value.
Area of Science:
- Medical Imaging
- Cardiovascular Surgery
- Radiology
Background:
- Endovascular aortic aneurysm repair (EVAR) is a common procedure.
- Accurate post-procedural imaging is crucial for assessing stentgraft placement and detecting complications.
- Flat-panel CT (FP-CT) is a novel imaging modality available at the angiography table.
Purpose of the Study:
- To evaluate the utility of flat-panel CT (FP-CT) as a periprocedural imaging tool for aortic stentgraft procedures.
- To assess the ability of FP-CT to visualize stentgraft placement and detect endoleaks.
- To determine the value of FP-CT in thoracic and abdominal aortic aneurysm repair.
Main Methods:
- FP-CT was performed on 21 patients immediately after endovascular treatment of thoracic and abdominal aortic aneurysms.
- Stentgraft devices included Zenith-endoprosthesis and Excluder-endoprosthesis.
- Images were acquired using a rotating C-arm and reconstructed in MIP, MPR, and VRT modes.
Main Results:
- FP-CT accurately depicted stentgraft placement and alignment within the landing zones in all patients.
- The aneurysmal sac was well visualized.
- One type II endoleak was detected; one angiographically verified type I endoleak was missed.
- Artifacts from the prosthesis, markers, and guidewires, as well as aortic pulsation, reduced image resolution and visualization of alignment.
Conclusions:
- FP-CT is a promising imaging tool for periprocedural assessment of aortic stentgrafts.
- It can provide valuable information regarding stentgraft placement and the aortic sac.
- Further research is required to fully establish the role of FP-CT in thoracic and abdominal aortic stentgraft procedures.
