Orbit - Optic Canal (Foramen) (Rhese Method)This is a featured page

Radiographic Positioning


Adult
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Name of projection Orbit - Optic Canal (Foramen) (Rhese Method)
Area Covered Optic canal and non distorted view of optic foramen
Pathology shownBony abnormalities of optic foramen
Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Landscape
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
FilterNo
Exposure 75 kVp
20 mAs
FFD / SID 100cm
Central Ray CR perpendicular to IR
Centred to downside orbit
Collimation Four sides of collimation
Collimate to size of orbit approximately 10cm x 10cm
Markers Superior
Marker orientation PA
Shielding Gonadal (check your department's policy guidelines)
RespirationSuspended
Positioning
  • The patient should be seated, facing the upright bucky
  • Patients chin, cheek and nose against bucky surface
  • Adjust head so that the midsagittal plane forms a 53° angle with IR
  • Position acanthiomeatal line perpendicular to plane of IR
  • Centred to downside orbit
Critique

Positioning
Area Covered
Collimation
Exposure
Special Notes



AndyC
AndyC 		Latest page update: made by AndyC , Jun 14 2011, 8:40 PM EDT (about this update About This Update AndyC Edited by AndyC

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