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. 06, 2001
Filed:
Aug. 03, 1999
Menno W. J. Prins, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to an X-ray examination apparatus which includes an X-ray filter for locally attenuating the X-ray beam. The X-ray filter includes a plurality of filter elements. The X-ray absorption of a filter element is adjusted by way of the quantity of X-ray absorbing liquid present in the filter element. The filling of the filter element is adjusted by means of an electric voltage. In addition to the X-ray absorbing liquid, the filter element contains a second liquid which is present at an interface between the X-ray absorbing liquid and the filter element, said second liquid being chemically inert relative to the X-ray absorbing liquid and having an electrical conductivity which deviates from that of the first liquid.