The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 1983
Filed:
May. 18, 1978
Nathan R Whetten, Burnt Hills, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
An ionization chamber for use in determining the spatial distribution of x-ray photons in computerized 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. X-ray radiation enters the chamber through a thin conductive window disposed substantially perpendicular to the anodes and cathodes. A dielectric layer disposed on the inner surface of the window accumulates charge during x-ray irradiation to modify the electric field in the region between the anodes, cathodes, and window so as to permit the collection of electrons and ions produced by interactions in that region. In a preferred embodiment, a conductive electrode is placed on the inner surface of the dielectric layer and maintained at anode potential to modify and stabilize the electric field behind the window and thus stabilize the detector characteristics.