Detector for responding to a two-dimensional pattern of X-radiation
AssigneeE M I Limited
InventorsBrian L. Dalton, Robert J. Froggatt
Life of this patent
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Abstract
The invention relates to a flat plate X-ray detector. In one example a back plate of a flat xenon detector has coaxial cables in a conducting solid matrix connected to the power supply. Each cable center conductor is a small capacitor which charges in response to ion collection. The signals are derived via a commutator. In another embodiment the back plate is an anisotropic plate discharged in a spiral pattern similar to a gramophone record groove.
Claims7
A detector for responding to a two-dimensional pattern of X-radiation emergent from an object under examination to generate discrete electrical signals indicative of the amounts of radiation received at each of many locations distributed over the pattern, said detector comprising a substantialy flat chamber, containing a noble gas, with an X-ray previous input window disposed to receive said pattern of radiation and a back-plate for said chamber disposed opposite said window and containing a respective electrical contact member for each of said locations, the contact members being exposed to said gas and mutually insulated so as to create an array of capacitive probes each capable, when suitable operating potentials are applied to the chamber, of storing charge indicative of the amount of radiation at the appropriate location of said pattern, and said detector further including interrogation means for sequential interrogating said contact members to sense the charges stored thereby.
Dependencies are inferred from the claim text.