X-ray detector

Details X-ray detector X-ray detector

1975-09-26

1977-06-21

Dixon, Harold A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250374, 250389, 313 93, G01T 118

Patent

active

040313964

ABSTRACT:
An ionization chamber for use in determining the spatial distribution of x-ray photons in tomography systems comprises a plurality of substantially parallel, planar anodes separated by parallel, planar cathodes and enclosed in a gas of high atomic weight at a pressure from approximately 10 atmospheres to approximately 50 atmospheres. The cathode and anode structures comprise metals which are substantially opaque to x-ray radiation and thereby tend to reduce the resolution limiting effects of x-ray fluoresence in the gas.
In another embodiment of the invention the anodes comprise parallel conductive bars disposed between two planar cathodes.
Guard rings eliminate surface leakage currents between adjacent electrodes.

REFERENCES:
patent: 2696564 (1954-12-01), Ohmart
patent: 2873399 (1959-02-01), Garrison
patent: 3373283 (1968-03-01), Lansiart et al.
patent: 3385988 (1968-05-01), Hyun
patent: 3418474 (1968-12-01), Spergel et al.
patent: 3509339 (1970-04-01), Doehner
patent: 3614437 (1971-10-01), Allemand
patent: 3704284 (1972-11-01), Garmire
patent: 3898465 (1975-08-01), Zaklad et al.
patent: 3930162 (1975-12-01), Reiss

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