Study RAD Film 6.1-6.4 Flash Cards

 
Pile Management Card
RAD Film 6.1-6.4

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shorter exposure time will do what to the density
increase
longer exposure time will do what to the density
decrease
the duplicating film emulsion is placed on what side
emulsion against original
what duplicates an existing radiograph, is a single emulsion film and exposed with ultraviolet light
duplicating film
what are the characteristics of mammography film
originally utilized double emulsion, direct exposure film, new film developed for low exposure applications
what type of film will produce inadequate film density
ortho green or orthochromatic film
what is the occlusal film used for
useful for locating foreign bodies in the floor of the oral cavity, impacted teeth, cyst in the palate and nasal bones examinations
what are the interproximal or bitewing film used for
locating cavities between the teeth
what is periapical film used for
radio graphing the roots and supporting structures as well as determining abscess, cyst and bone loss do to periodontal disease
dental film are available in what two catagories
speed and size
what are the three types of dental films
periapical, interproximal (bitewing), occlusal
what are some characteristics of direct exposure films
not to be used with intensifying screens, insensitive to flourescent light, thicker emulsion, faster film, ued for small body parts
what is another name for non screen film
direct exposure film
in orthochromatic film what would an improper screen/film combination result in
reduced speed and increased exposure time
what color light do calcium tungstate screens emit
blue and blue violet
what are the characteristics of screen film
most often used in radiography, sensitive to fluorescent light, faster than direct exposure, has two types of film: blue and green
what is the high speed emulsion coating applied to both sides of the film
duplitized film
what is the range of densities resulting from contrast in the subject being radiographed
subject latitude
what is the optical density differences inherent in the film and influenced somewhat by the processing of the film
film contrast
what is the range of exposures over which the x ray film will respond with optical densities in the diagnostically useful range
film latitude and exposure latitiude
what is the ability of an x ray film to respond to a minimum quantity of x ray exposure
film speed or sensitivity
when does the gelatin in the emulsion become porous and swollen
in the developer
what are the two important chemical reactions that occur during the development process
oxidation and reduction
what is the purpose of film development
to make a latent image a visible image
what is known as the development center
sensitization speck
what refers to the exit beam
aerial image
what is the radiation from a body part which becomes lessened in intensity by the various body parts it traverses
remnant radiation
what is the process by which unexposed and undeveloped silver bromide crystals are washed away leaving a permanent silver image
fixation
what is the decrease in positive valence or increase in the negative valence by the gaining of electrons
reduction
what changes a latent image into a visible image
developement
what is the imperfection that intrudes into the crystal lattice or on the crystal surface
sensitization speck
what is the visible image which is produces by the exposure to light or x ray photons after development
manifest image
what is an invisible image produced in the film emulsion by light or x ray photons
latent image
what is the removal of an electron from an atom
ionization
how thick are the emulsion layers
1/1000 of an inch
what is the active ingredient in radiographic emulsion
silver halide crystals
what does the digestion process do to the emulsion
increases its sensitivity
what is the process called when the AgBr is heated to 50-80 degrees centigrade
digestion
what does the super coating do
protects the emulsion from scratches, pressure, and contamination
what is another name for the protective coating of the film
supercoating
what are the characteristics of the emulsion
active layer, most important part of the film, sensitive to light
what is another name for the sub coating layer of film
adhesive layer
why is the film base tinted
reduce strain on the eye and improve overall quality of the film
what are the characteristics of the film base
transparent. slightly blue, slow burning, rigid in structure
what was the benefits of using two sided emulsion
resulted in greater speed and reduced patient exposure
what was the solution to the problem of one sided emulsion
placed emulsion on both sides and used cellulose triacitate instead cellulose nitrate for flammability. ( safety film)
what were the problems with coating only one side of the film with emulsion
caused excessive rolling of the film and extreme flammability
when was x ray film produced
WWI
what is composed of calcium tungstate fluorescent crystals
intensifying screen
who developed the intensifying screen
thomas edison
november 8, 1895 this man proved the existence of the x ray
roentgen
invented a mechanical plate coating machine
eastman
manufactured the first dry plate with a washed emulsion
burgess
Invented the gelatin silver bromide dry plate. The foundation of photography
maddox
discovered the phenomenon of developement
daquerre
coined the word photography
herschel
Inventor of the negative-positive method of photography
talbot
Invented the first camera
Niepce
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