orbits & eyes
Post on 28-Jan-2016
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DESCRIPTIONOrbits & Eyes. Modified Occipito- mental (baseline 55 0 to film) Occipito –frontal with 25 0 - 30 0 caudal angulation of the beam Lateral For Localization of IOFB – Three Lateral projections with the patient looking Up, Straight, & Down. Orbits – PA 25 0 - 30 0. Orbits – modified OM. - PowerPoint PPT Presentation
Orbits & EyesModified Occipito- mental (baseline 550 to film)Occipito frontal with 250- 300 caudal angulation of the beamLateralFor Localization of IOFB Three Lateral projections with the patient looking Up, Straight, & Down.
Orbits PA 250 - 300
Orbits modified OMMedian plane perpendicular to buckyInter orbital line parallel to buckyChin is adjusted to bring the base line (plane) at 550 to buckyCentral ray perpendicular and to pass through a point in midline at the level of the inferior orbital margins
Optic ForaminaNote :- The optic canals open into the rear of the bony orbits, that is the optic foramina. The canals pass forwards and laterally at approximately 350 to the median sagittal plane and downwards at approximately 350 to the odito-meatal plane, and this is the path the central ray must take to demonstrate the foramen.
Both sides must be done foe comparison
Optic ForamenPosition the head so that The Nose, Zygoma and Chin of the side being examined is in contact with the buckyOrbit in center of the buckyMedian sagital plane 530 to buckyThe Acanthiomeatal line (plane) is perpendicular to the buckyBeam perpendicular & to pass through the orbit
Optic foramen PA obliqueHead in PA position related to the buckyPosition the head so that The Nose, Cheek and Chin of the side being examined is in contact with the buckyOrbit in center of the buckyMedian sagital plane 550 to buckyThe base line (plane) is at 550 to the buckyBeam perpendicular & to pass through the orbit
Optic foramen- Radiographic appearanceCriteriaOptic foramen visible at the end of the sphenoid ridge in inferior and lateral quadrant of the orbit.