Local wall thickness in finite element models improves prediction of abdominal aortic aneurysm growth Eric K. Shang, MD, Derek P. Nathan, MD, Edward.

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Presentation transcript:

Local wall thickness in finite element models improves prediction of abdominal aortic aneurysm growth Eric K. Shang, MD, Derek P. Nathan, MD, Edward Y. Woo, MD, Ronald M. Fairman, MD, Grace J. Wang, MD, Robert C. Gorman, MD, Joseph H. Gorman, MD, Benjamin M. Jackson, MD Journal of Vascular Surgery Volume 61, Issue 1, Pages 217-223 (January 2015) DOI: 10.1016/j.jvs.2013.08.032 Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 1 A, Digital Imaging and Communications in Medicine (DICOM) image with segmentation into luminal (green), inner arterial (red), and outer adventitial (blue) surfaces. B, Three-dimensional reconstruction, cut at corresponding level, with stress plot overlaid. Journal of Vascular Surgery 2015 61, 217-223DOI: (10.1016/j.jvs.2013.08.032) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 2 A, Calculated wall-thickness map overlaid onto aortic geometry. B, Stress contour map derived from uniform wall thickness (UWT) aortic geometry. C, Stress contour map derived from variable wall thickness (VWT) aortic geometry. Note the colocalization of areas with low wall thickness and high peak wall stress (PWS), especially in the aneurysm neck. Journal of Vascular Surgery 2015 61, 217-223DOI: (10.1016/j.jvs.2013.08.032) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 3 Plot showing relationship between peak wall stress (PWS) derived from uniform wall thickness (UWT) finite element analysis (FEA) and aneurysm expansion rate. Journal of Vascular Surgery 2015 61, 217-223DOI: (10.1016/j.jvs.2013.08.032) Copyright © 2015 Society for Vascular Surgery Terms and Conditions

Fig 4 Plot showing relationship between peak wall stress (PWS) derived from variable wall thickness (VWT) finite element analysis (FEA) and aneurysm expansion rate. Journal of Vascular Surgery 2015 61, 217-223DOI: (10.1016/j.jvs.2013.08.032) Copyright © 2015 Society for Vascular Surgery Terms and Conditions