Facial Bones - PA 30° (Modified Parietocanthial)This is a featured page

Radiographic Positioning

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Name of projection Facial Bones - PA 30° (Modified Parietocanthial)
Area Covered Orbital floor, show a less distorted view of the entire orbital rim than a PA 15° view
Pathology shown Orbital fractures (blowout), foreign bodies, neoplastic and inflammatory processes
Radiographic Anatomy Facial Bones Radiographic Anatomy
IR Size & Orientation 24 x 30cm
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
Filter No
Exposure 75 kVp
20 mAs
FFD / SID 100cm
Central Ray CR perpendicular to IR
CR to exit at the acanthion
Collimation Collimate closely to outer margins of the skull
Markers Inferior and Lateral
Marker orientation PA
Shielding Gonadal (check your department's policy guidelines)
Respiration Suspend
  • The patient should be seated, facing the upright bucky.
  • Extend neck, resting chin and nose against bucky
  • Adjust head until Lips-meatal line (LML) is perpendicular, OML is 55° with IR
  • The median sagittal plane should be perpendicular to midline of bucky
  • CR perpendicular to IR
  • Centre CR to IR
  • CR to exit at the acanthion

Area Covered
Special Notes

Latest page update: made by AndyC , Jun 14 2011, 12:14 AM EDT (about this update About This Update AndyC Edited by AndyC

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