3D visualization of strain in abdominal aortic aneurysms based on navigated ultrasound imaging

Reidar Brekken; Jon Harald Kaspersen; Geir Arne Tangen; Torbjørn Dahl; Toril A. N. Hernes; Hans Olav Myhre

doi:10.1117/12.708776

29 March 2007 3D visualization of strain in abdominal aortic aneurysms based on navigated ultrasound imaging

Reidar Brekken, Jon Harald Kaspersen, Geir Arne Tangen, Torbjørn Dahl, Toril A. N. Hernes, Hans Olav Myhre

Proceedings Volume 6511, Medical Imaging 2007: Physiology, Function, and Structure from Medical Images; 65111H (2007) https://doi.org/10.1117/12.708776
Event: Medical Imaging, 2007, San Diego, CA, United States

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.

Citation Download Citation

Reidar Brekken, Jon Harald Kaspersen, Geir Arne Tangen, Torbjørn Dahl, Toril A. N. Hernes, and Hans Olav Myhre "3D visualization of strain in abdominal aortic aneurysms based on navigated ultrasound imaging", Proc. SPIE 6511, Medical Imaging 2007: Physiology, Function, and Structure from Medical Images, 65111H (29 March 2007); https://doi.org/10.1117/12.708776

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