Sinuses - OM Waters Open MouthThis is a featured page

Radiographic Positioning


Adult
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Name of projection Sinuses - Occipito Mental (Waters) Open Mouth
Area Covered Maxillary sinuses with inferior aspect visualised free from superimposing alveolar processes and petrous ridges, the inferior orbital rim, an oblique view of the frontal sinuses and the sphenoid sinuses visualised through the open mouth
Pathology shown Inflammatory conditions ie: sinusitis, secondary osteomyelitis and sinus polyps
Radiographic Anatomy Sinuses Radiographic Anatomy
IR Size & Orientation 18 x 24cm
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 exits at acanthion
Collimation Collimate closely to area of sinus cavaties
Markers Inferior and Lateral
Marker orientation PA
Shielding Gonadal (check your department's policy guidelines)
Respiration Suspended
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 (EAM) 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.
  • Open patients mouth (to enable visualisation of sphenoid sinus)
  • CR perpendicular to IR
  • CR exits at acanthion
Critique

 Positioning
Area Covered
Collimation
Exposure
Special Notes



AndyC
AndyC 		Latest page update: made by AndyC , Jun 17 2011, 8:16 AM EDT (about this update About This Update AndyC Edited by AndyC

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