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WorksheetsX ray,intensifying screens and processing
Total questions: 10
Worksheet time: 6mins
2nd outermost layer of the film on 2
sides
Made up of:
o Sliver halide crystal (photosensitive) – sya yung tumatanggap ng x-ray, suspended in gelatin
Silver bromide
Silver iodide
o Gelatin matrix (crystals are suspended)
Emulsion
Plastic Base
Adhesive
Supercoat/ Protective
Clear gelatin to shield the emulsion from mechanical damage
Para di magasgasan yung film
Emulsion
Plastic Base
Adhesive
Supercoat/ Protective layer
a thin sheet of lead foil placed between the film
prevent:
residual radiation from continuing into the patient's tissue
Scattered secondary radiation from x-ray
OUTER WRAPPER
BLACK PAPER WRAPPER
LEAD FOIL
FILM SPEED
- faster the film, less exposure, less radiation
- Is a function of the number and sizes of silver halide crystals
- Larger crystals, faster film, but poorer image quality
- D speed or E speed The best
OUTER WRAPPER
BLACK PAPER WRAPPER
LEAD FOIL
FILM SPEED
- panoramic, skull, cephalometric
- Used in combination with intensifying screens
- Designed to be sensitive to visible light
- Intensifying screens converts × - radiation to visible light
- L or R placed on the outside of the cassette or electronic marking
- Need of dark room with red light
PERIAPICAL FILMS
BITE WING
OCCLUSAL FILM
SCREEN FILMS
STAGES OF PROCESSING
the sensitized silver halide crystals in
the emulsion area converted into black
metallic silver to produce the
black/grey parts of image (translucent)
Development
Washing
Fixation
Drying
STAGES OF PROCESSING
unsensitized silver halide crystals in the emulsion area is removed to reveal the transparent or white parts (radiopaque)
Development
Washing
Fixation
Drying
Fixes the emulsion to the base
Found between emulsion and plastic base
Para di malaglag
Emulsion
Plastic Base
Adhesive
Supercoat/ Protective
Clear gelatin to shield the emulsion from mechanical damage
Para di magasgasan yung film
Emulsion
Plastic Base
Adhesive
Supercoat/ Protective layer
The film has an _______ ____ on one corner that is used to have orientation. Its position is marked on the back of the packet or it can be felt as a small bump. The side of the film where the bump is raised should always be placed towards the x-ray beam
(a)
