Fig. 3

Correlations between virtual torsional rigidity (VTR) values obtained by the two manual workflows (MSS vs. MDS) and the two automated workflows (CFT vs. SRT) for contralateral and operated bones using both material models: (a) single-zone material model validated for ovine cortical bone18 and (b) dual-zone validated for cortical bone and callus19. (OP: operated, CO: contralateral, MSS: Manual Single Segmentation, MDS: Manual Dual Segmentation, CFT: Contour-Free Technique, SRT: Snake-Reliant Technique, MAE: Mean Absolute Error)