X-Ray imaging device for directly displaying X-ray images

Details X-Ray imaging device for directly displaying X-ray images X-Ray imaging device for directly displaying X-ray images

1983-05-20

1985-10-22

Smith, Alfred E.

Radiant energy

Luminophor irradiation

2504841, G21K 400, H01J 3150

Patent

active

045490830

ABSTRACT:
A device for directly displaying X-ray images on a phosphor screen of a cathode ray tube by means of a steady cathodoluminescence is arranged such that the excitation of the phosphor screen is controlled by the persistent polarization and depolarization of the phosphor crystals in the phosphor screen by exposure to X-rays. The X-ray images formed on the phosphor screen in the cathode ray tube may be read out by synchronously detecting changes in the electric current of the collecting electrodes of the tube during the scanning of a reading electron beam on the phosphor screen displaying the X-ray images.

REFERENCES:
patent: 3484752 (1969-12-01), Kallmann
patent: 3617743 (1971-11-01), Rabatin et al.
patent: 3655978 (1972-04-01), Faria et al.
patent: 4297584 (1981-10-01), Buchanan et al.
patent: 4421671 (1983-12-01), Cusano et al.
Lyuji Ozawa, "Hysteresis in the Voltage Dependence of Cathodoluminescence", Appl. Phys. Lett., vol. 43, No. 11, (Dec. 1983), pp. 1073-1074.
Lyuji Ozawa and Shigeru Hayakawa, "A Study on Cathodoluminescence Intensities in the Range Below 3 kV", Journal of Luminescence, vol. 28, (1983), pp. 327-335.

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