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:
Sep. 26, 2000
Filed:
Nov. 19, 1993
Raymond P Grenier, Milwaukee, WI (US);
Picker International, Inc., Cleveland, OH (US);
Abstract
A gamma ray collimator for use in a cardiac inspections system is disclosed which resolves energetically unperturbed gamma rays emitted from a patient and removes inelastic scattered gamma rays. A plurality of collimator elements each have walls, with each wall defining a plane comprised of a first material layer covered by a second material layer and absorbing inelastic scattered gamma rays, the planes being parallel to a central longitudinal axis in each of the collimator elements. The walls of each collimator element define an elongated longitudinal passageway having open ends through which the energetically unperturbed gamma rays enter and leave. The first material layer has a large absorption coefficient for gamma rays, and the second material layer has a large absorption coefficient for inelastically scattered gamma rays generated in the first material layer responsive to gamma rays emitted from the patient.