Fig. 1From: Compensatory classification in spine sagittal malalignment with lumbar degenerationMethod to measure spine sagittal alignment. PT: pelvic tilt; SS: sacral slope; PI: pelvic incidence; TK: thoracic kyphosis; LL: lumbar lordosis; C7S: C7 slope; TLK: thoracolumbar kyphosis; C7-SVA: C7 sagittal vertical axisBack to article page