Xeroradiography

Xeroradiography is a type of X-ray imaging in which a picture of the body is recorded on paper rather than on <a href="/facts/Film/wM3b9Kk3">film</a>. 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 <a href="/facts/Scorotron/CmUkGhIo">scorotron</a>.
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, <a href="/facts/Photographic_developer/kSs0tfgV">photographic developers</a> 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.
<a href="/facts/Xeromammography/TXzsUXuq">Xeromammography</a> is a form of xeroradiography.

Xeroradiography open-in-new

Xeroradiography