Figure 8

The intra-operator repeatability results. (a) A cluster of 20 lines representing the difference between the manual and automatic curves in the frontal plane; (b) standard deviation of the differences (blue curve) and standard deviation of 20 manual curve determinations (black curve) at each X coordinate in the frontal plane; (c) the differences between the manual and automatic curves in the sagittal plane; (d) standard deviation of the differences (blue curve) and standard deviation of 20 manual curve determinations (black curve) at each X coordinate in the sagittal plane. The red horizontal line represents the transition between the thoracic and lumbar spine zones.