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. 01, 1998
Filed:
Apr. 17, 1997
Juergen Wohlrab, Forchheim, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An arithmetic unit for a computed tomography apparatus has special hardware in the form of a processor, a median filter ASIC, an angle clipping ASIC and two memories are employed. In the median filter ASIC, for each pixel a determination of increments for generating a supporting point address are made by the processor, the access addresses are calculated and the supporting points are addressed from a first of the memories and a median value formation is undertaken in the median filter ASIC, followed by a difference image production in the median filter ASIC. In the angle clipping ASIC, a determination is made of the coordinates of each pixel with reference to a rotational center in the processor, and supporting points are generated and accumulated from the difference image resulting from the median filtering, and a resultant image is generated in the angle clipping ASIC.