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:
Oct. 13, 1981
Filed:
Oct. 24, 1979
Godfrey N Hounsfield, Newark, GB;
E M I Limited, Hayes, GB;
Abstract
In a computerized tomographic apparatus of the kind in which the performances of different detectors are normalized causing them to receive radiation along substantially similar paths in various overlap zones within a body under examination, the normalization can be adversely affected by the amount of radiation exposure suffered by each detector prior to its receipt of radiation along the paths in the overlap zones. The invention permits such adverse effects to be reduced or eliminated by averaging the electrical signals, produced by the detectors in respect of the paths in the overlap zones; the signals relating to paths near the center of an overlap zone being combined with the signals relating to other paths distributed substantially across the overlap zone but the signals relating to paths near the edges of an overlap zone being combined with the signals relating to only a few, neighboring paths.