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Radiology
Chapter 10 Vocab
Question | Answer |
---|---|
Safelight | Special light fixtures fitted with filters. Permits only the passage of light frequencies to which the film is least sensitive. |
Film Bin | A special container in the darkroom to hold film for reloading cassettes. Can only be opened under safelight illumination. |
Film Identification Printer | A flasher or stamper used to print patient information on each film prior to processing. |
Crescent mark | An artifact formed by attempting to hold a film horizontal with one hand and allowing it to bend. |
Pass box | A feature used to transfer film to and from the darkroom while it is in use. |
Densitometer | An instrument used to measure the transmission of light through a tiny area of the film. |
Sensitometer | A device that prints a standard gray scale on a film. |
Film dryer | A metal cabinet with an electric heating coil and a fan to circulate air. |
Artifact | An erroneous portion of an image or tracing that does not accurately represent the subject of the image or measurement being recorded. |
Automatic Film Processor | A processor requiring 3 minutes or less to process film from start to finish. This is made possible primarily by the increased strength and temperature of solutions. |
Base + Fog | An index indicating the average measurement of the clear portion of the test film. The usual value for the index is an optical density between 0.0 and 0.20. |
Manual Film Processing System | A film developing process that uses a large tank plumbed for constant water flow and has smaller chemical tanks for developer and fixer that are placed inside the water tank. |