Cephalogram
Write short note on cephalogram.
Answer. Cephalogram is an extraoral radiography of skull.
- This view is used to evaluate facial growth and development trauma, disease and developmental anomalies.
- This projection demonstrate the bones of face, skull as well as the sof tissue projection of the face.
- In oral surgery and prosthesis, it is used to establish pretreatment and post-treatment records.
Film Position
Cassette is placed perpendicular to the flor with the long axis of the cassette placed vertically.
Position of Patient
- Left side of the patient’s head is positioned against the cassette.
- Mid-sagittal plane is perpendicular to the flor and parallel to the film.
- Patient’s head is stabilized with the help of the ear rods, nasion positioner and the orbital rod.
- Patient is asked to keep the teeth in occlusion.
Central Ray
- Central ray is directed perpendicular to the cassette through the portion.
- The distance between the X-ray source and the mid-coronal plane of the patient is 60 inches.
Exposure Parameter
kVp: 84.
mA: 13.
Seconds: 1.6.
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