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Proceedings Paper

3D visualization of strain in abdominal aortic aneurysms based on navigated ultrasound imaging
Author(s): Reidar Brekken; Jon Harald Kaspersen; Geir Arne Tangen; Torbjørn Dahl; Toril A. N. Hernes; Hans Olav Myhre
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Paper Abstract

The criterion for recommending treatment of an abdominal aortic aneurysm is that the diameter exceeds 50-55 mm or shows a rapid increase. Our hypothesis is that a more accurate prediction of aneurysm rupture is obtained by estimating arterial wall strain from patient specific measurements. Measuring strain in specific parts of the aneurysm reveals differences in load or tissue properties. We have previously presented a method for in vivo estimation of circumferential strain by ultrasound. In the present work, a position sensor attached to the ultrasound probe was used for combining several 2D ultrasound sectors into a 3D model. The ultrasound was registered to a computed-tomography scan (CT), and the strain values were mapped onto a model segmented from these CT data. This gave an intuitive coupling between anatomy and strain, which may benefit both data acquisition and the interpretation of strain. In addition to potentially provide information relevant for assessing the rupture risk of the aneurysm in itself, this model could be used for validating simulations of fluid-structure interactions. Further, the measurements could be integrated with the simulations in order to increase the amount of patient specific information, thus producing a more reliable and accurate model of the biomechanics of the individual aneurysm. This approach makes it possible to extract several parameters potentially relevant for predicting rupture risk, and may therefore extend the basis for clinical decision making.

Paper Details

Date Published: 29 March 2007
PDF: 7 pages
Proc. SPIE 6511, Medical Imaging 2007: Physiology, Function, and Structure from Medical Images, 65111H (29 March 2007); doi: 10.1117/12.708776
Show Author Affiliations
Reidar Brekken, SINTEF Health Research (Norway)
Jon Harald Kaspersen, SINTEF Health Research (Norway)
Geir Arne Tangen, SINTEF Health Research (Norway)
Torbjørn Dahl, St. Olavs Hospital, Univ. Hospital of Trondheim (Norway)
Norwegian Univ. of Science and Technology (Norway)
Toril A. N. Hernes, SINTEF Health Research (Norway)
Norwegian Univ. of Science and Technology (Norway)
Hans Olav Myhre, St. Olav's Hospital, Univ. Hospital of Trondheim (Norway)
Norwegian Univ. of Science and Technology (Norway)


Published in SPIE Proceedings Vol. 6511:
Medical Imaging 2007: Physiology, Function, and Structure from Medical Images
Armando Manduca; Xiaoping P. Hu, Editor(s)

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