Figure 2:

Diagram of cross-sectional medial geometry. (a) Representative 3D aortic root wall with thin cylindrical geometry. (b) 3D aortic root wall shown with a translucent boundary. The medial surface (blue) passes midway between the luminal surface and outer surface of the root wall. (c) The 2D medial geometry of a cross-section of the root wall. The point m₀ is the center of a maximally inscribed disk that is tangent to the root wall boundary at b₀. The maximally inscribed disk centered at m₁ has radius R₁ and is tangent to the root wall surface at two medially linked boundary points: b₁⁺ and b₁⁻.