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exposure
(redirected from entrance exposure)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.07 sec.

exposure

(1) The degree to which information can be accessed using authorized or unauthorized methods. See penetration test and risk analysis.

(2) In a camera, the amount of light that reaches the film (analog) or CCD or CMOS sensor (digital). The exposure is achieved by the sum of the shutter speed, aperture (f-stop) and ISO setting. See shutter speed, f-stop and ISO speed.


exposure
1. Archit the position or outlook of a house, building, etc.; aspect
2. Mountaineering the degree to which a climb, etc. is exposed (see exposed (sense 4))
3. Photog
a. the act of exposing a photographic film or plate to light, X-rays, etc.
b. an area on a film or plate that has been exposed to light, etc.
c. (as modifier): exposure control
4. Photog
a. the intensity of light falling on a photographic film or plate multiplied by the time for which it is exposed
b. a combination of lens aperture and shutter speed used in taking a photograph


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? Mentioned in ? References in periodicals archive
 
4 mA, the automatic fluoroscopic entrance exposure rate was measured to be 35.
The letter stated the firm's diagnostic x-ray systems do not comply with the following items of the Performance Standard: "We measured the entrance exposure rate in the manual mode of the fluoroscopic system to be 27 roentgens per minute at the point where the center of the useful beam enters the patient.
The agency wrote that diagnostic X-ray equipment installed by GE at an undisclosed location exceeded the allowed limit for entrance exposure rates in automatic and manual exposure modes.
 
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