L5-S1: There is minimal decreased disc height, postsurgical change with intervertebral disc spacer, posterior lateral orthopedic hardware with bilateral pedicle screws in good postsurgical position. The orthopedic hardware creates mild streak artifact which mildly degrades images. There is a laminectomy defect, spondylolisthesis with 3.5mm of anterolisthesis of L5, posterior annular disc bulging greatest in the left foraminal region lying adjacent to the exiting left L5 nerve root. There is fusion of the facet joints, normal central canal and right neural foramen (image #69-70, 135).