The dry photoelectric process by which an X‐ray image is captured using metal plates coated with a semiconductor, such as selenium.
A diagnostic technique to detect breast cancer in its early developmental stages.
photoelectric process for producing an X-ray image that uses lower radiation and shorter exposure time than conventional X-ray techniques; it is used chiefly to detect breast tumors.
A method developed by Chester Carlson and patented by the Xerox Corporation that uses a selenium plate charged with several hundred volts to form a latent image of a radiological exam. The latent image is made visible with a powder toner similar to that used in a copying machine. The powder image is transferred and heat fused to a sheet of paper. The images exhibit “edge contrast” because of the shape of the electric fields that pull toner onto the plate. Such edge contrast is useful for identifying minute calcifications in the breast. Hence, xeroradiography is used primarily for mammography.
A method of photoreproduction used in radiography. It is a dry process involving the use of metal plates covered with a powdered substance, such as selenium, electrically and evenly charged. The x-rays alter the charge of the substance to varying degrees, depending on the tissues they have traversed. This produces the image. This procedure has been replaced by film and screen mammography because of its high radiation dose.
Radiography takes on a distinct form devoid of the conventional employment of x-ray film or fluorescent screens. Instead, an innovative technique is employed, wherein a metal surface, coated with selenium, effectively takes the place of x-ray film. Upon exposure to x-rays, a peculiar post-process follows, whereby the selenium-coated surface is delicately dusted with calcium carbonate.