Xeroradiography is a type of X-ray imaging in which a picture of the body is recorded on paper rather than on
film
A film, also known as a movie or motion picture, is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, emotions, or atmosphere through the use of moving images that are generally, sinc ...
. In this technique, a plate of selenium, which rests on a thin layer of aluminium oxide, is charged uniformly by passing it in front of a
scorotron A scorotron (from screen controlled corona), also called a corona grid, is a device which creates corona discharge current, used in xerography. Scorotrons appear in photocopiers, in xeroradiography equipment, and similar applications.
References
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The process was developed by engineer Dr. Robert C. McMaster in 1950.
As X-ray photon impinges on this amorphous coat of selenium, charges diffuse out, in proportion to energy content of the X-ray. This occurs as a result of
photoconduction. The resulting imprint, in the form of charge distribution on the plate, attracts toner particles, which is then transferred to reusable paper plates. In contrast to conventional X-rays,
photographic developer
In the Photographic processing, processing of photographic films, plates or papers, the photographic developer (or just developer) is one or more chemicals that convert the latent image to a visible image. Developing agents achieve this conversio ...
s are not needed. Hence the term xeroradiography; 'xero' meaning dry in Greek.
It requires more radiation exposure. Historically used in mammography prior to the advent of digital mammography.
Xeromammography
Xeromammography is a photoelectric method of recording an x-ray image on a coated metal plate, using low-energy photon beams, long Shutter speed, exposure time, and dry Photographic developer, chemical developers.
It is a form of xeroradiography. ...
is a form of xeroradiography.
References
External links
Xeroradiographyentry in the public domain NCI Dictionary of Cancer Terms
External links
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Radiography
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