brightness contrast the perceiver’s tendency to exaggerate the physical difference in the light intensities of two adjacent regions, as a result, a gray patch looks brighter on a black background and darker on a white background
What is the call frequency?
What is the unit of time used to measure x-rays exposure?
What are future challenges for the specialty of radiology?
A diagnostic film is produced using 10 mA and .5 second. What exposure time is needed to produce the same film at 20 mA?
Which of the following is MOST radioapaque?a. amalgamb. porcelainc. composited. acrylic?
When viewed on a light source, a dental radiograph that demonstrates many shades of gray is said to havea. high contrastb. low contrastc. high densityd. low density
Identify the maximum permissible dose (MPD) of an occupationally exposed persona. 0.01 Sv/yearb. 0.02 Sv/yearc. 0.03 Sv/yeard. 0.05 Sv/year
Image magnification results from decreaseda. target sizeb. target-film distancec. object-film distance
Identify the cells that are most sensitive to x-radiationa. nerve cellsb. muscle cellsc. small lymphocytesd. cardiac cells
The standard film size used for adult bitwings and posterior periapicals is numbera. 1b. 2c. 4d. 0
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