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:
Dec. 14, 1993
Filed:
May. 07, 1992
Iain Stark, Dollard des Ormeaux, CA;
Abel Ferreira, Pointe-Claire, CA;
Abstract
The discriminator comprises a summing circuit for producing a sum signal from light detectors of a scintillation camera; a slope analysis circuit for analyzing a slope of the sum signal to produce a slope analysis result indicative of a given characteristic change in the slope; a first event characteristic evaluation circuit for producing in response to the slope analysis result and the sum signal a first event characteristic signal representative of an energy of the first event; a second event characteristic evaluation circuit for producing in response to the slope analysis result and the sum signal a second event characteristic signal representative of an energy of the second event; and a validity analyzer circuit for producing a valid event indicator signal in response to the slope analysis result, the first event characteristic signal and the second event characteristic signal. A method of pulsepile discrimination is also disclosed. The valid event indicator signal can indicate the presence of simultaneous events and the number of valid events among the simultaneous events.