Imaging Guidelines for Lumbar Spine Radiographs

Standard Views and Techniques

The American College of Radiology recommends upright anteroposterior (AP) and lateral views as the minimum standard requirement for lumbar spine radiographs, providing crucial functional information about axial loading of the spine 1, 2
Upright positioning is essential for evaluating the lumbar spine, as it provides functional information about axial loading 2
The lateral view should visualize the entire lumbar spine, including the lumbosacral junction, to ensure a comprehensive assessment 3

Flexion and extension views should be included when evaluating for suspected segmental instability, spondylolisthesis assessment, post-surgical evaluation of fusion integrity, and evaluation of persistent symptoms after conservative management 2, 4
These dynamic views can reveal abnormal motion or increased mobility not apparent on static images, providing valuable information for diagnosis and treatment 4

If radiographs reveal abnormalities or are inconclusive, advanced imaging may be warranted, with MRI lumbar spine without contrast preferred for soft tissue evaluation, and CT lumbar spine without contrast better for detailed bony assessment 1, 2
CT myelography may be considered when MRI is contraindicated or inconclusive, providing an alternative for evaluating the lumbar spine 1
The American College of Radiology suggests that while radiographs are often the initial imaging study, they have limitations in detecting early disc disease, soft tissue pathology, and subtle fractures, highlighting the need for advanced imaging in certain cases 1, 2