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. 14, 2004
Filed:
May. 21, 2003
Otto Sembritzki, Wachenroth, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method of correcting the extrafocal radiation of an X-ray tube in image recordings with a computed tomograph, includes subjecting measured data, obtained from detector channels of at least one detector row in the computed tomography, to logarithmic manipulation and back projection in order to obtain the image recordings. The measured data, before the logarithmic manipulation and back projection, is subjected to convolution with a detector-channel-dependent convolution core EN(k), which is derived from a distribution of the extrafocal radiation on at least one detector channel of the computed tomograph or a computed tomograph of an identical type. The present method permits good correction of the extrafocal radiation without reference to the convolution cores to be used for the filtered back projection.