Fig. 1From: Spatial geometric and magnetic resonance signal intensity changes with advancing stages of nucleus pulposus degenerationWorkflow to obtain the nucleus pulposus edge coordinates. a Determine the longitudinal axis of the intervertebral disc by clicking on the corners of adjacent vertebrae in a given sequence. b Click on the margins of the intervertebral disc on the longitudinal axis. c Mark the contour of the nucleus pulposus and the intervertebral disc. d Output of 6 sets of coordinates along the longitudinal axisBack to article page