Methods for Three-Dimensional Geometric Characterization of the Arterial Vasculature |
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Authors: | Padraig M O’Flynn Gerard O’Sullivan Abhay S Pandit |
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Institution: | (1) Department of Mechanical and Biomedical Engineering, National University of Ireland, University Road, Galway, Ireland;(2) National Centre for Biomedical Engineering Science, National University of Ireland, Galway, Ireland;(3) Section of Interventional Radiology, University College Hospital, Galway, Ireland |
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Abstract: | Complex vascular anatomy often affects endovascular procedural outcome. Accurate quantitative assessment of three-dimensional
(3D) in-vivo arterial morphology is therefore vital for endovascular device design, and preoperative planning of percutaneous interventions.
The aim of this work was to establish geometric parameters describing arterial branch origin, trajectory, and vessel curvature
in 3D space that eliminate the errors implicit in planar measurements. 3D branching parameters at visceral and aortic bifurcation
sites, as well as arterial tortuosity were determined from vessel centerlines derived from magnetic resonance angiography
data for three subjects. Errors in coronal measurements of 3D branching angles for the right and left renal arteries were
3.1 ± 3.4° and 7.5 ± 3.7°, respectively. Distortion of the anterior visceral branching angles from sagittal measurements was
less pronounced. Asymmetry in branching and planarity of the common iliac arteries was observed at aortic bifurcations. The
renal arteries possessed considerably greater 3D curvature than the abdominal aorta and common iliac vessels with mean average
values of 0.114 ± 0.015 and 0.070 ± 0.019 mm−1 for the left and right, respectively. In conclusion, planar projections misrepresented branch trajectory, vessel length,
and tortuosity proving the importance of 3D geometric characterization for possible applications in planning of endovascular
interventional procedures and providing parameters for endovascular device design. |
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Keywords: | Abdominal aorta Visceral branch arteries Common iliac arteries Branching angle Bifurcation planarity Arterial tortuosity Curvature Torsion |
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