Skull (PA view)

Andrew Murphy and Dr Matt A. Morgan et al.

The skull PA view is a non-angled PA radiograph of the skull. This view provides an overview of the entire skull rather than attempting to highlight any one region.

  • the patient is erect
  • the patient's forehead is placed against the image detector allowing for the nose to be in contact as well
  • posteroanterior projection
  • centering point
    • the beam is exiting at the nasion
  • collimation
    • superior to the skin margins
    • inferior to include the most inferior aspects of the skull
    • lateral to include the skin margin
  • orientation  
    • portrait
  • detector size
    • 24 cm x 30 cm
  • exposure
    • 75-80 kVp
    • 20-25 mAs
  • SID
    • 100 cm
  • grid
    • yes (this can vary departmentally)

The petrous ridge will overlap the lower 1/3 of the orbits, the innominate lines should be equal distance from the lateral borders of the orbits.

  • the PA view decreases the radiation dose to the eyes compared with the AP view
  • less magnification of the facial bones compared with the AP view
  • overlap of facial bone structures makes it harder to evaluate the sinuses than with an angled view (e.g. Caldwell view)
Radiographic views

Article information

rID: 37163
Section: Radiography
Synonyms or Alternate Spellings:
  • Skull frontal view

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Cases and figures

  • Figure 1
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  • Case 1: skull PA view
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  • Figure 2: cranial landmarks
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  • Figure 3: skull positioning lines
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