Fig. 4

Bland-Altman analysis was performed to compare root volumes between the two segmentation approaches (ATS vs. MA). Measurements from the same animal are labelled with equal colour, and the position of the teeth (upper right UR, upper left UL, lower left LL, lower right LR) is labeled by icons. Median tooth segmentation time amounted to 8.93 min (quartiles: 8.13–11.76 min) for ATS, and to 55.26 min (quartiles: 49.62–62.76 min) for MA. Tooth segmentation was by 81% significantly faster using ATS (P < 0.01)