Pelvic x-ray interpretation

Measurements

• pubic symphysis: up to 5mm in width, up to 2mm offset, no overlap
• SI joints: 2-4 mm in width

Checklist

• obturator foramina for symmetry-clue for rotation of film
• diastasis of pubic symphysis and both SI joints
• assymetry of illiac wings (rotation or deformity)
• sacral foramina-especially the superior cortical margins
• transverse processes of L5
• integrity of all cortical lines, especially around acetabulum.

Views

• Outlet views-sacral fxs, SI joint abnormalities
• Inlet view-displacement of ant. Fragments into pelvis..
• (posterior abnormalities usually need CT )

See Also

• Pelvic Fractures