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Multislice CT Angiography of Fenestrated Endovascular Stent Grafting for Treating Abdominal Aortic Aneurysms: a Pictorial Review of the 2D/3D Visualizations
Authors:Zhonghua Sun  Bibombe P Mwipatayi  Yvonne B Allen  David E Hartley  and Michael M Lawrence-Brown
Institution:1Discipline of Medical Imaging, Department of Imaging and Applied Physics, Curtin University of Technology, Perth, Western Australia, Australia.;2Department of Vascular Surgery, Royal Perth Hospital, School of Medicine and Pathology, University of Western Australia, Western Australia, Australia.;3Cook R & D, Perth, Western Australia, Australia.;4School of Public Health, Curtin University of Technology, Perth, Western Australia, Australia.
Abstract:Fenestrated endovascular repair of an abdominal aortic aneurysm has been developed to treat patients with a short or complicated aneurysm neck. Fenestration involves creating an opening in the graft fabric to accommodate the orifice of the vessel that is targeted for preservation. Fixation of the fenestration to the renal arteries and the other visceral arteries can be done by implanting bare or covered stents across the graft-artery ostia interfaces so that a portion of the stent protrudes into the aortic lumen. Accurate alignment of the targeted vessels in a longitudinal aspect is hard to achieve during stent deployment because rotation of the stent graft may take place during delivery from the sheath. Understanding the 3D relationship of the aortic branches and the fenestrated vessel stents following fenestration will aid endovascular specialists to evaluate how the stent graft is situated within the aorta after placement of fenestrations. The aim of this article is to provide the 2D and 3D imaging appearances of the fenestrated endovascular grafts that were implanted in a group of patients with abdominal aortic aneurysms, based on the multislice CT angiography. The potential applications of each visualization technique were explored and compared with the 2D axial images.
Keywords:Fenestration  Endovascular repair  Aortic aneurysm  Three-dimensional imaging
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