Nasal - OM

Adult

Other related pages of interest

Name of projection	Nasal Bone - Occipito Mental (OM)
Area Covered	Infraorbital rim, maxillae, zygomatic bones and arch, nasal septum, anterior nasal spine
Pathology shown	Fractures (blowout, tripod, leforte) , foreign bodies, fluid levels in sinus (if performed erect), neoplastic processes
Radiographic Anatomy	Nasal Bone Radiographic Anatomy
IR Size & Orientation	24 x 30cm Portrait
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 centre of IR CR exits at 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
Positioning	The patient should be seated, facing the upright bucky. The median sagital plane should be perpendicular to the cassette, this is done by checking the external audiatory meatuses and the outer canthi of the eyes. The patients mentum of the chin should be touching the upright bucky and sufficiently raised to bring the orbito-meatal baseline or radiographic baseline 45° from horizontal. Clearing the maxillary sinuses of the petrous ridge. CR perpendicular to IR CR to centre of IR CR exits at acanthion
Critique PACEMAN	Positioning Area Covered Collimation Exposure
Special Notes

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