Lumbar & D-L Spine X-Ray Positioning Master Guide

Comprehensive Clinical Reference for Standard, Oblique, Spot, D-L Spine, and Functional Views

Routine & Essential Lumbar Views

1. AP View (Lumbar Spine)Standard

Patient PositionSupine or erect, knees and hips flexed to flatten lumbar lordosis against grid, arms across chest.

Beam DirectionPerpendicular to L3 (level of lower rib cage / 4 cm above iliac crest).

Clinical IndicationEvaluating lumbar vertebral alignment, pedicles, spinous processes, and bone density from L1 to L5.

2. Lateral View (Lumbar Spine)Standard

Patient PositionTrue lateral recumbent position on radiolucent table with knees flexed, support placed between knees/waist.

Beam DirectionPerpendicular to L3 (at the level of iliac crest).

Clinical IndicationAssessment of lumbar lordosis, intervertebral disc spaces, vertebral heights, and spondylolisthesis.

3. D-L Spine AP ViewCombined

Patient PositionErect or supine, long cassette/panel covering from lower thoracic down to sacral region (T11 to S1).

Beam DirectionPerpendicular to midpoint of cassette (centered around T12-L1 junction).

Clinical IndicationSimultaneous evaluation of lower dorsal and lumbar spine alignment, curvatures, and generalized pathology.

4. D-L Spine Lateral ViewCombined

Patient PositionTrue lateral decubitus or standing stance, arms raised, utilizing broad long-length image receptor.

Beam DirectionHorizontal central ray directed to the thoracolumbar junction.

Clinical IndicationComprehensive assessment of kyphosis and lordosis transitions from the mid-thoracic down to the sacrum.

5. RPO / LPO Oblique ViewsOblique

Patient PositionPatient rotated 45° from supine/erect; spine forms 45° angle with image receptor.

Beam DirectionPerpendicular to L3 (5 cm above iliac crest and 5 cm medial to elevated ASIS).

Clinical IndicationDemonstrating the **”Scotty Dog”** appearance to evaluate pars interarticularis defects (spondylolysis).

6. L5-S1 Spot (Lateral Cone) ViewTargeted

Patient PositionLateral recumbent position with knees flexed, support under waist to keep spine level.

Beam DirectionDirected 5° to 8° caudad, centered 4 cm inferior to iliac crest and 5 cm posterior to ASIS.

Clinical IndicationDetailed visualization of lumbosacral junction (L5-S1), disc space narrowing, and listhesis.

7. AP Axial L5-S1 Junction ViewSpecial

Patient PositionSupine position with legs extended or slightly flexed for patient comfort.

Beam DirectionAngled 30° cephalic for males (35° for females) centered at level of ASIS.

Clinical IndicationOpening up the lumbosacral joint space (L5-S1) clearly without overlapping pelvic structures.

8. Flexion & Extension LateralsFunctional

Patient PositionLateral standing/sitting; patient bends maximum forward (flexion) and arches back (extension).

Beam DirectionHorizontal central ray centered to L3 or L5-S1 junction.

Clinical IndicationAssessing segmental spinal stability, hypermobility, instability, and post-fusion assessment.

9. Right & Left Bending AP ViewsFunctional

Patient PositionErect AP stance; patient laterally bends torso maximally to the right and then to the left.

Beam DirectionPerpendicular to L3 midpoint.

Clinical IndicationEvaluating flexibility of spinal curvatures, scoliosis correction potential, and segment mobility.

10. Trauma Cross-Table LateralEmergency

Patient PositionPatient lies strictly supine on trauma spine board; do not move or logroll the patient.

Beam DirectionHorizontal cross-table ray centered to mid-lumbar region.

Clinical IndicationEmergency evaluation of acute lumbar/D-L spine fractures in critical trauma patients.

📌 Quick Jump Directory (Lumbar & D-L Views)

1. AP View 2. Lateral View 3. D-L Spine AP 4. D-L Spine Lateral 5. RPO/LPO Oblique 6. L5-S1 Spot View 7. AP Axial L5-S1 8. Flexion/Extension 9. Right/Left Bending 10. Trauma Lateral