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

1. obturator foramina for symmetry-clue for rotation of film
2. diastasis of pubic symphysis and both SI joints
3. assymetry of illiac wings (rotation or deformity)
4. sacral foramina-especially the superior cortical margins
5. transverse processes of L5
6. 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 )