Transaxial computed tomography image of the lumbar spine at the level of L3. Left side: The lateral recess angle is defined as the angle between the lines parallel to the floor and the roof of the lateral recess. Right side: The height of the lateral recess is defined as the shortest distance from the most anterior point of the superior articular process to the posterior border of the vertebral body.
Steurer et al. BMC Musculoskeletal Disorders 2011 12:175 doi:10.1186/1471-2474-12-175