xeroradiography xeroradiography xeroradiography is a type of x-ray imaging in which a picture of the body is recorded on paper rather than on film. 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. the process was developed by engineer dr. robert c. mcmaster in 1950. xeroradiographymeshd014986 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 developers 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 is a form of xeroradiography.