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. Author manuscript; available in PMC: 2022 May 24.
Published in final edited form as: J Biomech. 2021 Mar 20;121:110392. doi: 10.1016/j.jbiomech.2021.110392

Figure 1: IVD segmentation processing.

Figure 1:

Visualization of the directions of the 1st, 2nd and 3rd principal component vectors are denoted by the X, Y and Z axes, respectively. The Z-axis demonstrates the axis along which height is calculated. (A) The outer contours of each IVD were segmented on each slice of the MR images. (B) Segmentation yielded a 3D wireframe model of each IVD. (C) Following alignment of the 3rd principal component vector with the z-axis of the cartesian coordinate system, a 3D triangulation mesh of the disc was created for subsequent analyses.