The lumbar spine anteroposterior view images the lumbar spine in its anatomical position. This projection is utilized in many clinical conditions including trauma, postoperatively, and chronic conditions. The lateral view shows an orthogonal view of the AP/PA view and is utilized in many conditions such as trauma, postoperatively, and chronic conditions. This view is also ideal for characterizing spinal alignment. The flexion and extension view are specialized projections to provide functional tests of lumbar spine instability, often in the context of spondylolisthesis.