Skull (Caldwell view)

The Caldwell view is a caudally angled PA radiograph of the skull, designed to better visualize the paranasal sinuses, especially the frontal sinus.

  • patient is seated in front of the upright detector
  • the patient's forehead is placed against the image detector
  • forehead and nose are both touching the detector
  • the orbitomeatal line is running perpendicular to the detector
  • petrous ridge is below orbits
  • posteroanterior projection
  • centring point
    • angled caudad around 15° to exit at the nasion 
  • collimation
    • laterally to the skin margins
    • superior/inferior to the areas of the sinus cavities 
  • orientation  
    • portrait 
  • detector size
    • 24 cm x 30 cm 
  • exposure
    • 70-80 kVp
    • 20 mAs
  • SID
    • 100 cm
  • grid
    • yes 
  • no rotation evident via the symmetrical nature of the orbits 
  • the innominate lines should be equal distance from the lateral borders of the orbits
  • always guarantee your patient is not 'hunched' over, when they are being examined, this can cause artefact from the shoulders and the patient is more likely to be rotated; best to move the chair up close to the detector so they are sitting up straight for the x-ray
  • remeber, having your head against an upright deector isnt comfertable at all, try to have everything set up before you position the patient to ensure patient comfort 
  • constantly use a side marker and regularly place it PA, skulls can get tricky with siding, a lot of venders tend to 'flip' images to appear AP

Radiographic views
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Article Information

rID: 35612
System: Head & Neck
Section: Radiography
Synonyms or Alternate Spellings:
  • Occipitofrontal view

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