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Pelvis (AP view)

Andrew Murphy et al.

The AP pelvis view is part of a pelvic series examining the iliac crest, sacrum, proximal femur, pubis, ischium and the great pelvic ring. It is of considerable importance in the management of severely injured patients presenting to emergency departments 1

  • patient is supine
  • lower limbs are internally rotated 15-25° from the hip (do not attempt this if a fracture is suspected)
  • AP projection
  • 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 third of the femur
  • orientation  
    • landscape 
  • detector size
    • 35 cm x 43 cm
  • exposure
    • 70-80 kVp
    • 20-30 mAs
  • SID
    • 100 cm
  • grid
    • yes
  • entirety of the bony pelvis is imaged from superior of the iliac crest to the proximal shaft of the femur
  • obturator foramina appear equal
  • iliac wings have an equal concavity
  • greater trochanters of the proximal femur are in profile

Internal rotation can be assisted with the use of sandbags over the lateral edges of the patient's feet. 

If one obturator foramina appear ‘closed’ the patient could be rotated away from the image receptor on that side. 

Radiographic views

Article information

rID: 44863
Section: Radiography
Synonyms or Alternate Spellings:

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Cases and figures

  • Figure 1: AP projection
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  • Figure 2: anterior pelvis annotated
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  • Figure 3: AP female
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  • Figure 4: AP male
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