Pediatric pelvis (AP view)

The AP pelvis view is a routine view for pediatric patients to examine the hip joints, proximal femora, iliac crests and pelvic ring. The complications of pelvic pathology in pediatrics can significantly affect the child's future, highlighting the importance of proper patient positioning 1.

  • patient is supine with no rotation of the pelvis
  • ideally, patient legs internally rotated 1
  • patient is placed on top of the detector
  • anteroposterior projection
  • centring point
  • collimation
    • laterally to the skin margins
    • superior to above the iliac crests
    • inferior to the proximal third of the femur
  • orientation
    • landscape
  • detector size
    • will vary depending on the patient's size
  • exposure 2
    • 63-70 kVp
    • 2-5 mAs
  • SID
    • 100 cm
  • grid
    • if patient thickness is above 10cm, use of a grid is advisable 2
  • criteria for pelvis remains the same as for adult pelvic radiographs
  • entirety of the bony pelvis is imaged from the iliac crests to the proximal third of the femur
  • no rotation
    • equal obturator foramen
    • equal concavity of the iliac wings

Preparing the room beforehand (set up the detector, exposure and prepare lead gowns) is extremely beneficial for pelvis imaging as young children will often begin to cry the moment they are placed supine.

Ideally, if parental holding is required, the parent holds the child from the feet-end in order to be in the child's direct line of sight. This is to avoid the child rotating their pelvis to look at their parent;

  • this will require clear instructions for the parents to follow so that they do not allow rotation of the child's pelvis or motion artifact from kicking
  • if the parent is accompanying the child by holding them in position, whilst the parent puts on a lead gown, it is the radiographer's responsibility to ensure the baby does not roll off the x-ray table
  • if other methods can be used such as distraction techniques, or swaddling, this is ideal to avoid scattered radiation to parents and staff 3
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Article information

rID: 67441
Section: Radiography
Synonyms or Alternate Spellings:
  • Paediatric pelvis (AP supine view)
  • Pediatric pelvis (AP view)
  • Paediatric pelvic radiograph (AP view)

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Cases and figures

  • Figure 1: nine months old
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  • Figure 2: eleven months old
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  • Figure 3: older child
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