Rasterstereographic Analysis: Kyphotic and Lordotic Angle. Kyphotic and lordotic angles were calculated from geometric analysis of the sagittal profile, which provides the points of inflection and their respective inflection tangents in the cervico-thoracic transition (ICT), the thoracic-lumbar transition (ITL) and the lumbar-sacral transition (ILS). The kyphotic and lordotic angles are each spanned by two of the inflectional tangents. b Rasterstereographic Analysis: Lateral Deviation. Lateral deviation refers to the distance between the center of the reconstructed vertebral body and the sagittal plane at a given vertebral level. c Rasterstereographic Analysis: Vertebral Rotation. Vertebral rotation at a given level was estimated from surface rotation at the pertinent point of the symmetry line, using the sagittal direction as a reference. d Rasterstereographic Analysis: Pelvic Tilt. Pelvic tilt was calculated from the height difference of the two lumbar dimples. e Rasterstereographic Analysis: Pelvic Torsion. Pelvic torsion was calculated from the difference of surface orientations in the lumbar dimples. It has a positive value with posterior rotation of the right pelvic side and an anterior rotation of the left side.
Lippold et al. BMC Musculoskeletal Disorders 2012 13:151 doi:10.1186/1471-2474-13-151