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Hip (AP view)

James Hayes and Andrew Murphy et al.

The AP hip is part of a radiographic series examining the anatomy of the hip joint and proximal femur.

  • 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
    • 2.5cm distal to a line bisecting the ASIS and symphysis pubis (over the femoral pulse)
  • collimation
    • laterally to the skin margins
    • superior to ASIS
    • inferior to the proximal third of the femur
  • orientation  
    • portrait
  • detector size
    • 24 cm x 30 cm
  • exposure
    • 70-80 kVp
    • 15-25mAs
  • SID
    • 100 cm
  • grid
    • yes
  • the entirety of the hip and proximal femur are seen in on the image with the long axis of the femur running parallel to the long axis of the image
  • greater trochanter should be seen in profile signifying adequate internal rotation of the limb 

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: 58728
Section: Radiography
Synonyms or Alternate Spellings:

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Cases and figures

  • Figure 1: hip AP view
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