Abdomen (PA prone view)

Dr Ian Bickle and Mr Andrew Murphy et al.

PA prone radiograph is rarely performed, often utilised when a patient is unable to lay supine. The projection is adequate for the examination of the abdominal cavities, however, not as practical for the renal structures due to magnification.

  • the patient is prone, either on the x-ray table (preferred) or on a trolley
  • patients should be changed into a hospital gown, with radiopaque items (e.g. belts, zippers) removed
  • the patient should be free from rotation; both shoulders and hips equidistant from the table/trolley
  • the X-ray is taken in full inspiration
  • PA projection
  •  centring point
    • the midsagittal place (equidistant from each ASIS) at the level of the iliac crest
  • collimation
    • laterally to the lateral abdominal wall
    • superior to the diaphragm
    • inferior to the inferior pubic rami
  • orientation
    • portrait
  • detector size
    • 35 cm x 43 cm
  • exposure
    • 70-80 kVp
    • 30-120 mAs; AEC should be used if available
  • SID
    • 100 cm
  • grid
    • yes
  • lateral abdominal wall should be included
  • inferior pubic rami should be included inferiorly
  • if possible, the diaphragm should be included superiorly
  • the abdomen should be free from rotation with a symmetry of the:
  • no blurring of the bowel gas due to respiratory motion

For larger patients, it may be necessary to perform two x-rays using a landscape orientation of the detector to include the entire abdomen.

Exposure will need to be adjusted according to an imaging system (CR or DR) and patient size. Where possible mAs should be manipulated to ensure adequate image density and appropriate image contrast.

Ensure the patient has adequate head space to breath and hear instructions.

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Article information

rID: 53646
Section: Radiography
Synonyms or Alternate Spellings:

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