Film Holders Flashcards
Two types of film holder
Cassette
Cardboard film holder
Used to house and transport film w/o exposing to white light
Film holders
Rigid holder that contains intensifying screen and film
Cassettes
Exposure side of the cassette is
Front
Is made up of thin radiolucent material for easy penetration
Exposure side
Modern cassettes are made of
Carbon materials
Heavy metal and lead foil prevents
Backscatter
Xrays are scattered back to the film by the cassette holding device
Backscatter
Maintains good film / screen contact
Contact felt / layer of padding
Produced backscattered radiation
Compton effect
Made of two pieces of cardboard or plastic to form light-tight envelope
Cardboard film holders
Special envelope attached to the back portion of the holder for the insertion of film
Cardboard film holder
Cardboard film holder is used for
Direct exposure of the film
Enables better access positioning for impaction and bone union imaging
Curved cassettes
Cassttes fitted to body curves for radiography of joints , vertebrae and jaws
Xray flexible cassettes
Light proof pouches made of high quality tear resistant vinyl and will stand up to the day usage
Dental cassettes w/ screens
Designed for use in mammography , use for single emulsion film
Mammography cassettes
Mammography cassettes are made of ____ w/ low xray absorption
Polycarbonate
Used for portable radiography and decubitus position that needs grid
Heavist of all cassettes
Grid cassettes
Holds xray film for exposure by imager
Laser imager cassettes
