Method and apparatus for xeroradiography

Details Method and apparatus for xeroradiography Method and apparatus for xeroradiography

1978-11-09

1981-07-14

Smith, Alfred E.

Radiant energy

Source with charged plate-type detector

118647, G03G 1508

Patent

active

042788846

ABSTRACT:
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 electrostatic 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.

REFERENCES:
patent: 4038943 (1977-08-01), Nelson et al.

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