Xeroradiography
Encyclopedia
Xeroradiography is a type of x-ray
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'.
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
s are not needed. Hence the term xeroradiography; 'xero' meaning dry in Greek.
It requires more radiation exposure.
Its use is in mammography.
Xeromammography
is a form of xeroradiography.
X-ray
X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...
in which a picture of the body is recorded on paper rather than on film
Film
A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects...
. 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'.
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
Photographic developer
In the processing of photographic films, plates or papers, the photographic developer is a chemical that makes the latent image on the film or print visible. It does this by reducing the silver halides that have been exposed to light to elemental silver in the gelatine matrix...
s are not needed. Hence the term xeroradiography; 'xero' meaning dry in Greek.
It requires more radiation exposure.
Its use is in mammography.
Xeromammography
Xeromammography
Xeromammography is a photoelectric method of recording an x-ray image on a coated metal plate, using low-energy photon beams, long exposure time, and dry chemical developers.It is a form of xeroradiography....
is a form of xeroradiography.
External links
- Xeroradiography entry in the public domain NCI Dictionary of Cancer Terms
External links
- http://www.medcyclopaedia.com/library/topics/volume_i/x/xeroradiography.aspx