Motion Calculations on Stent Grafts in AAA


Klein, Almar and Renema, W. Klaas Jan and Vliet, J. Adam van der and Oostveen, Luuk J. and Hoogeveen, Yvonne and Schultze Kool, Leo J. and Slump, Cornelis H. (2011) Motion Calculations on Stent Grafts in AAA. In: R.T. Grundmann (Ed.), Diagnosis, Screening and Treatment of Abdominal, Thoracoabdominal and Thoracic Aortic Aneurysms. Intech, pp. 126-144. ISBN 9789533074665

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Abstract:Endovascular aortic repair (EVAR) is a technique which uses stent grafts to treat aortic aneurysms in patients at risk of aneurysm rupture. Although this technique has been shown to be very successful on the short term, the long term results are less optimistic due to failure of the stent graft. The pulsating blood flow applies stresses and forces to the stent graft, which can cause problems such as breakage, leakage, and migration. Therefore it is of importance to gain more insight into the in vivo motion behavior of these devices. If we know more about the motion patterns in well-behaved stent graft as well as ill-behaving devices, we shall be better able to distinguish between these type of behaviors These insights will enable us to detect stent-related problems and might even be used to predict problems beforehand. Further, these insights will help in designing the next generation stent grafts. Firstly, this work discusses the applicability of ECG-gated CT for measuring the motions of stent grafts in AAA. Secondly, multiple methods to segment the stent graft from these data are discussed. Thirdly, this work proposes a method that uses image registration to apply motion to the segmented stent model
Item Type:Book Section
Copyright:© 2011 Intech
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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