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Vascular Deformation Mapping of Abdominal Aortic Aneurysm
Drew J Braet1, Jonathan Eliason1, Yunus Ahmed2
1Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI 48109, USA.
Tomography (Ann Arbor, Mich.)
|June 2, 2021
Summary
Vascular deformation mapping (VDM) offers a new way to track abdominal aortic aneurysm (AAA) 3D growth, outperforming traditional diameter measurements. This technique aids in monitoring aneurysm stability and planning surgical repair.
Area of Science:
- Vascular Surgery
- Medical Imaging Analysis
- Biomechanical Engineering
Background:
- Abdominal aortic aneurysm (AAA) surveillance relies on maximum diameter, often from computed tomography angiography (CTA).
- Maximum diameter measurements have limitations in predicting rupture risk, AAA growth, and oversimplify complex anatomy.
- Existing imaging methods lack sensitivity for detecting subtle, regional AAA changes.
Purpose of the Study:
- To evaluate the feasibility of Vascular Deformation Mapping (VDM) for quantifying three-dimensional (3D) growth in abdominal aortic aneurysms (AAAs).
- To compare the efficacy of VDM in detecting AAA growth versus traditional maximum diameter measurements.
- To explore VDM's utility in monitoring post-endovascular aneurysm repair (EVAR) sac growth.
Main Methods:
- Seven patients with infra-renal AAAs were analyzed using Vascular Deformation Mapping (VDM).
- VDM employed deformable image registration to quantify 3D changes in aortic wall geometry.
- The technique was applied to assess both native AAA growth and excluded aneurysm sac growth after EVAR.
Main Results:
- VDM successfully identified and quantified 3D growth in AAAs, revealing changes not apparent with maximum diameter.
- The technique demonstrated the ability to detect the absence of significant growth.
- VDM effectively quantified the growth of the excluded aneurysm sac following EVAR.
Conclusions:
- VDM is a feasible and sensitive technique for measuring 3D AAA growth, offering advantages over maximum diameter.
- VDM provides a more comprehensive assessment of aneurysm changes, aiding in monitoring stability.
- This method shows potential as an adjunct for surgical planning and detecting regional AAA growth.
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