Fig. 8 | Scientific Reports

Fig. 8

From: Standing CT-based finite element models efficiently identify regions of high mechanical strain in equine metacarpal subchondral bone

Fig. 8

(A–C) Dorsal oblique CT slices of the distal third metacarpal bone (MC3) from three horses showing bilateral sclerosis (BS, A), a lateral parasagittal groove lesion (LGL, B), and biaxial condylar lesions (BCL, C). Dashed rectangles denote the region of interest (ROI; 50 mm width, 20 mm depth, 1 mm thickness); arrows indicate lesion sites. Distal is oriented toward the top and proximal toward the bottom of each image. (D–F) Maximum (red) and minimum (black) principal strain directions within the ROI for each horse. Arrow orientation indicates the principal strain direction, and arrow length represents its relative magnitude. Compressive (minimum) principal strains are directed predominantly perpendicular to the articular surface, whereas tensile (maximum) principal strains are oriented tangentially. Patterns of principal strain direction were consistent between the slice-based and 3-D FE models.

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