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:
Apr. 03, 1990
Filed:
Oct. 22, 1987
Wolfgang Knuepfer, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
An intensifier foil specifically employable in mammography is provided that minimizes stationary noise and enhances topical resolution. The luminophore is composed of Gd.sub.2 O.sub.2 S:Tb grains, whose mean grain size lies between approximately 3.4 microns to about 3.6 microns. Approximately 5% to about 15% of the luminophore grains are larger than 6.5 microns and approximately 85% to about 95% are larger than 2 microns with the luminophore otherwise having a scattered grain size distribution. The bonding agent includes approximately 0.1 to about 0.2 weight percent SiO.sub.2 particles having a grain size of approximately 10 nm to about 100 nm. The substrate is constructed from a polyester foil having a dark pigment.