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. Author manuscript; available in PMC: 2015 Dec 4.
Published in final edited form as: Radiology. 2014 Jun;271(3):633–652. doi: 10.1148/radiol.14132232

Figure 9.

Figure 9

CT angiography performed 1 year after deployment of a stent-graft to treat a descending thoracic aortic aneurysm. (a) Curved planar reformation demonstrates the proximal aspect of the stent-graft displaced from the lesser curve of the distal aortic arch, allowing contrast-enhanced luminal blood to flow around the stent-graft initially, inferiorly, and then in a spiraling direction distally (arrows). (b) Coronal oblique reformation through the distal aortic arch demonstrates poor fixation of the stent-graft at this level, with the endoleak channel filling over the majority of the aortic circumference (arrows). (c) Transverse section through a 9-cm descending aortic aneurysm (the aneurysm had measured 7 cm at the time of stent-graft deployment). Arrows mark the endoleak within the aneurysm sac. (d, e) Volume-rendered images of the distal stent-graft illustrate multiple fractures of the transverse stent rings (thin arrows) and the distal longitudinal strut (thick arrows). The ends of the fractured strut and rings are highly distracted, suggesting substantial motion and loss of structural integrity on the distal device, possibly leading to migration of the proximal device and the subsequent type IA endoleak and aneurysm expansion. (Reprinted, with permission, from reference 24.)