Method and apparatus for xeroradiography

Details Method and apparatus for xeroradiography Method and apparatus for xeroradiography

G - Physics

03

B

314/17

G03B 15/00 (2006.01) G03G 13/054 (2006.01) G03G 13/22 (2006.01)

Patent

CA 1128602

Abstract of the Disclosure My invention comprises a novel method of increasing the effective sensitivity of photoconductors to discharge by ionizing radiations by masking a latent electrostatic image formed by exposure of a subject to ionizing radiations, masking the latent electrostatic image, and then subjecting the masked electrostatic image to light exposure to increase the contrast of the latent electrostatic image. The thus enhanced latent electro- static image is then developed by either positive or negative development, and the developed image may, if desired, be transferred to a carrier sheet. The invention reduces the Roentgen level to which a patient is exposed. One form of apparatus for carrying out this method is shown, comprising a first toning means for masking the latent electrostatic image and means for subjecting the masked electrostatic image to enhancement by flooding the same with light exposure. A second toning means for developing the enhanced electrostatic image is provided.

333651

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