Pelvis radiography involves several standard views of the pelvis to examine the bones and joints. The AP view images the pelvis from front to back with the lower limbs internally rotated. The posterior oblique view has the patient lying on their side to image a suspected fractured hip. Additional views like Judet's projection can assess the acetabulum at an oblique angle. Proper patient positioning and centering are important to obtain clear images of the pelvis.

1. Pelvis Radiography
Mohd Abdullah Siddiqui
MMIT

2. • The AP pelvis view is part of a pelvic series examining the
iliac crest, sacrum, proximal femur, pubis, ischium.
• Indication : Trauma, Dis location.
• Patient position
• patient is supine.
• lower limbs are internally rotated 15-25° from the hip (do not
attempt this if a fracture is suspected) to demonstrate an AP
view of the proximal femur

3. • centering point
• the midpoint of the anterior superior iliac spine and the pubic symphysis
• collimation
• laterally to the skin margins
• superior to above the iliac crests
• inferior to the proximal femur
SID : 100 cm
• Grid : yes
• Cassette : 14×17 inch

6. • Posterior oblique
• The patient lies supine on the X-ray table, legs extended
• The patient rotates through 45° onto the affected side with
the hip abducted 45° and flexed 45°
• The knee is flexed to bring the lateral aspect of the thigh in
contact with the tabletop and the knee rests on the table in
the lateral position.

8. frog’s legs position
• When comparison of both hips is required.
• This may apply in children.
• The patient lies supine on the X-ray table with the anterior superior
iliac spines equidistant from the tabletop to avoid rotation of the
pelvis.
• The hips and knees are flexed and both limbs rotated laterally
through approximately 60°.

10. Judet’s’ projection
• This projection may be used to assess the acetabulum when a
fracture is suspected.
• Anterior oblique
• The patient lies prone on the X-ray table .
• The trunk is then rotated approximately 45º onto the UNAFFECTED
SIDE.
• In this position the rim of the acetabulum nearest the tabletop
• .

12. Reverse Judet’s
• The patient lies supine on the X-ray table.
• The AFFECTED SIDE is raised approximately 45º

13. SI joint
The central ray is angled 5–15º caudally

14. Antero-posterior
• The central ray is directed between 5–15° cranially.