Skull (Towne view)

The Towne view is an angled AP radiograph of the skull, used to evaluate for fractures of the skull and neoplastic changes

  • the patient's nuchal ridge is placed against the image detector
  • the infraorbitomeatal line (IOML) is perpendicular to the image receptor 
  • anteroposterior axial projection
  • centring point
    • the beam travels 30 degrees caudad to the orbitomeatal line (OML)
  • collimation
    • superior to include skin margins
    • inferior to include base of skull
    • lateral to the skin margins 
  • orientation  
    • portrait
  • detector size
    • 24 cm x 30 cm
  • exposure
    • 60-70 kVp
    • 10-20 mAs
  • SID
    • 100 cm
  • grid
    • no
  • dorsum sella overlies the foramen magnum
  • petrous ridges are symmetrical 
  • if the dorsum sella projects above the foramen magnum it requires an increase in angle
  • if the anterior arch of C1 is laying in the foramen magnum, less angle is required 
  • occipital bone and posterior fossa space better evaluated than with a non angulated AP view, which would have more skull base and facial bone overlap
  • better than a conventional AP view for evaluating an occipital plagiocephaly involving the lambdoid suture 
  • may be a useful additional view for evaluating skull fractures 1
Radiographic views
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Article information

rID: 37239
Section: Radiography
Synonyms or Alternate Spellings:
  • Grashey skull view
  • Skull AP axial view
  • Towne view
  • Chamberlain-Towne view
  • Chamberlain-Towne projection

Cases and figures

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    Figure 1: skull positioning lines
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    Case 1: Towne view (skull AP axial view)
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    Figure 2: cranial landmarks
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    Figure 3: Towne view (skull AP axial view)
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