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| shorter exposure time will do what to the density |
increase |
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usnavalmd Thu, 13 Nov 2008 04:07:08 GMT |
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| longer exposure time will do what to the density |
decrease |
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usnavalmd Thu, 13 Nov 2008 04:07:08 GMT |
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| the duplicating film emulsion is placed on what side |
emulsion against original |
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usnavalmd Thu, 13 Nov 2008 04:04:26 GMT |
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| what duplicates an existing radiograph, is a single emulsion film and exposed with ultraviolet light |
duplicating film |
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usnavalmd Thu, 13 Nov 2008 04:04:26 GMT |
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| what are the characteristics of mammography film |
originally utilized double emulsion, direct exposure film, new film developed for low exposure applications |
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usnavalmd Thu, 13 Nov 2008 04:04:26 GMT |
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| what type of film will produce inadequate film density |
ortho green or orthochromatic film |
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usnavalmd Thu, 13 Nov 2008 04:04:26 GMT |
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| 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 |
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usnavalmd Thu, 13 Nov 2008 03:57:01 GMT |
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| what are the interproximal or bitewing film used for |
locating cavities between the teeth |
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usnavalmd Thu, 13 Nov 2008 03:57:01 GMT |
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| 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 |
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usnavalmd Thu, 13 Nov 2008 03:57:00 GMT |
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| dental film are available in what two catagories |
speed and size |
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usnavalmd Thu, 13 Nov 2008 03:57:00 GMT |
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| what are the three types of dental films |
periapical, interproximal (bitewing), occlusal |
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usnavalmd Thu, 13 Nov 2008 03:49:07 GMT |
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| 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 |
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usnavalmd Thu, 13 Nov 2008 03:49:07 GMT |
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| what is another name for non screen film |
direct exposure film |
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usnavalmd Thu, 13 Nov 2008 03:49:06 GMT |
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| in orthochromatic film what would an improper screen/film combination result in |
reduced speed and increased exposure time |
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usnavalmd Thu, 13 Nov 2008 03:49:06 GMT |
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| what color light do calcium tungstate screens emit |
blue and blue violet |
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usnavalmd Thu, 13 Nov 2008 03:41:26 GMT |
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| 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 |
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usnavalmd Thu, 13 Nov 2008 03:41:26 GMT |
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| what is the high speed emulsion coating applied to both sides of the film |
duplitized film |
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usnavalmd Thu, 13 Nov 2008 03:41:26 GMT |
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| what is the range of densities resulting from contrast in the subject being radiographed |
subject latitude |
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usnavalmd Thu, 13 Nov 2008 03:41:26 GMT |
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| what is the optical density differences inherent in the film and influenced somewhat by the processing of the film |
film contrast |
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usnavalmd Thu, 13 Nov 2008 03:34:21 GMT |
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| 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 |
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usnavalmd Thu, 13 Nov 2008 03:34:21 GMT |
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| what is the ability of an x ray film to respond to a minimum quantity of x ray exposure |
film speed or sensitivity |
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usnavalmd Thu, 13 Nov 2008 03:34:21 GMT |
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| when does the gelatin in the emulsion become porous and swollen |
in the developer |
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usnavalmd Thu, 13 Nov 2008 03:34:21 GMT |
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| what are the two important chemical reactions that occur during the development process |
oxidation and reduction |
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usnavalmd Thu, 13 Nov 2008 03:25:49 GMT |
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| what is the purpose of film development |
to make a latent image a visible image |
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usnavalmd Thu, 13 Nov 2008 03:25:49 GMT |
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| what is known as the development center |
sensitization speck |
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usnavalmd Thu, 13 Nov 2008 03:25:49 GMT |
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| what refers to the exit beam |
aerial image |
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usnavalmd Thu, 13 Nov 2008 03:25:49 GMT |
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| what is the radiation from a body part which becomes lessened in intensity by the various body parts it traverses |
remnant radiation |
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usnavalmd Thu, 13 Nov 2008 03:20:22 GMT |
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| what is the process by which unexposed and undeveloped silver bromide crystals are washed away leaving a permanent silver image |
fixation |
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usnavalmd Thu, 13 Nov 2008 03:20:22 GMT |
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| what is the decrease in positive valence or increase in the negative valence by the gaining of electrons |
reduction |
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usnavalmd Thu, 13 Nov 2008 03:20:22 GMT |
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| what changes a latent image into a visible image |
developement |
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usnavalmd Thu, 13 Nov 2008 03:20:22 GMT |
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| what is the imperfection that intrudes into the crystal lattice or on the crystal surface |
sensitization speck |
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usnavalmd Thu, 13 Nov 2008 03:13:19 GMT |
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| what is the visible image which is produces by the exposure to light or x ray photons after development |
manifest image |
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usnavalmd Thu, 13 Nov 2008 03:13:19 GMT |
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| what is an invisible image produced in the film emulsion by light or x ray photons |
latent image |
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usnavalmd Thu, 13 Nov 2008 03:13:19 GMT |
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| what is the removal of an electron from an atom |
ionization |
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usnavalmd Thu, 13 Nov 2008 03:13:19 GMT |
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| how thick are the emulsion layers |
1/1000 of an inch |
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usnavalmd Thu, 13 Nov 2008 03:08:19 GMT |
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| what is the active ingredient in radiographic emulsion |
silver halide crystals |
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usnavalmd Thu, 13 Nov 2008 03:08:19 GMT |
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| what does the digestion process do to the emulsion |
increases its sensitivity |
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usnavalmd Thu, 13 Nov 2008 03:08:19 GMT |
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| what is the process called when the AgBr is heated to 50-80 degrees centigrade |
digestion |
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usnavalmd Thu, 13 Nov 2008 03:08:19 GMT |
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| what does the super coating do |
protects the emulsion from scratches, pressure, and contamination |
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usnavalmd Thu, 13 Nov 2008 03:02:11 GMT |
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| what is another name for the protective coating of the film |
supercoating |
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usnavalmd Thu, 13 Nov 2008 03:02:11 GMT |
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| what are the characteristics of the emulsion |
active layer, most important part of the film, sensitive to light |
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usnavalmd Thu, 13 Nov 2008 03:02:11 GMT |
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| what is another name for the sub coating layer of film |
adhesive layer |
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usnavalmd Thu, 13 Nov 2008 03:02:11 GMT |
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| why is the film base tinted |
reduce strain on the eye and improve overall quality of the film |
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usnavalmd Thu, 13 Nov 2008 02:56:17 GMT |
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| what are the characteristics of the film base |
transparent. slightly blue, slow burning, rigid in structure |
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usnavalmd Thu, 13 Nov 2008 02:56:17 GMT |
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| what was the benefits of using two sided emulsion |
resulted in greater speed and reduced patient exposure |
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usnavalmd Thu, 13 Nov 2008 02:56:17 GMT |
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| 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) |
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usnavalmd Thu, 13 Nov 2008 02:56:17 GMT |
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| what were the problems with coating only one side of the film with emulsion |
caused excessive rolling of the film and extreme flammability |
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usnavalmd Thu, 13 Nov 2008 02:42:26 GMT |
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| when was x ray film produced |
WWI |
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usnavalmd Thu, 13 Nov 2008 02:42:26 GMT |
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| what is composed of calcium tungstate fluorescent crystals |
intensifying screen |
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usnavalmd Thu, 13 Nov 2008 02:42:26 GMT |
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| who developed the intensifying screen |
thomas edison |
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usnavalmd Thu, 13 Nov 2008 02:42:26 GMT |
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| november 8, 1895 this man proved the existence of the x ray |
roentgen |
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usnavalmd Thu, 13 Nov 2008 02:37:57 GMT |
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| invented a mechanical plate coating machine |
eastman |
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usnavalmd Thu, 13 Nov 2008 02:37:57 GMT |
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| manufactured the first dry plate with a washed emulsion |
burgess |
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usnavalmd Thu, 13 Nov 2008 02:37:57 GMT |
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| Invented the gelatin silver bromide dry plate. The foundation of photography |
maddox |
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usnavalmd Thu, 13 Nov 2008 02:37:57 GMT |
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| discovered the phenomenon of developement |
daquerre |
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usnavalmd Thu, 13 Nov 2008 02:32:11 GMT |
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| coined the word photography |
herschel |
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usnavalmd Thu, 13 Nov 2008 02:32:10 GMT |
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| Inventor of the negative-positive method of photography |
talbot |
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usnavalmd Thu, 13 Nov 2008 02:32:10 GMT |
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| Invented the first camera |
Niepce |
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usnavalmd Thu, 13 Nov 2008 02:32:10 GMT |
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