Pelvis Xrays

A/P Pelvis

• Demonstrates: Acetabulum, pelvic ring, femoral neck, femoral heads
• Helpful for: Acetabular fx, Pelvic ring injury, Femoral neck fx, IT fx, hip arthritis, THA, AVN

Position: Supine with feet interally rotated 15°. Center cassette midway between ASIS and pubic symphysis. If feet externally rotated lesser trochanter is visible.

Beam directed perpendicular to plate.

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°

Inlet View

• Demonstrates: egg-shaped appearance of pelvic ring, sacral promontory should overlap the anterior cortex of the body of the first sacral vertebra
• Helpful for: Acetabular fx, Pelvic ring injury, sacral fracture,

Position: Supine Center cassette midway between ASIS and pubic symphysis.

Beam directed 40° cephalad

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• Demonstrates: Wedge-shaped appearance of the sacrum when viewed from the front, iliac wings, pubic rami. Top of the symphysis pubis should be at the level of the second sacral body.
• Helpful for: Acetabular fx, Pelvic ring injury, sacral fracture,

Position: Supine. Center cassette midway between ASIS and pubic symphysis.

Beam directed 45° caudad .

Roll over image to see example xray

• Demonstrates: acetabulum
• Helpful for: Acetabular fx,

Position: Supine on cassette, roll the patient 45 degrees in relation to the x-ray beam. Consider premedication for pain. May be obtained digitally without rolling the patient (Patel NH, J Orthop Trauma 1998;12:59)°

Beam directed perpendicular to cassette.

Roll over image to see example xray