Overview
The AP lumbar spine radiograph evaluates vertebral bodies sacral alignment and pelvic landmarks. The patient is positioned supine or upright with the detector centered to the lumbar region. This view complements lateral imaging for comprehensive lumbar assessment.
Technique
Center the detector to include L1 to S1 and ensure the patient is not rotated. Use appropriate exposure and immobilize the patient to reduce motion. Include the sacroiliac joints when indicated for pelvic pathology.
Clinical Indications
AP lumbar spine is indicated for low back pain trauma and suspected vertebral lesions. It helps detect spondylolisthesis and degenerative change. MRI provides detailed evaluation for disc and neural element pathology.
Image Assessment
Assess vertebral body heights alignment and look for spondylolisthesis or lytic lesions. Evaluate sacral slope and pelvic parameters when relevant. Correlate with lateral views for comprehensive interpretation.