Fig. 3From: The potential risk of spinal cord injury from pedicle screw at the apex of adolescent idiopathic thoracic scoliosis: magnetic resonance imaging evaluationThe measurement of the shift of spinal cord. The vertical distance between line c and d (Dc) represented distance between spinal cord and medial wall of pedicle on the concave side with 0 mm (a), 0.88 mm (b) and 1.9 mm (c)Back to article page