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:
Dec. 27, 1994
Filed:
Dec. 10, 1993
Reiner Liebetruth, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a computer tomography apparatus having an x-ray radiator and a radiation detector rotatable on a frame around an examination subject, so that an x-ray beam is also rotated around the subject, the plates of a primary radiation diaphragm are controlled so that the thickness of the x-ray beam, measured in a direction perpendicular to its propagation direction, is varied dependent on the rotational angle of the x-ray beam. During examination of subjects having a highly elliptical cross-section, image artifacts are avoided because the beam thickness is varied so that more quanta reach the detector in the angular range wherein the most pronounced radiation attenuation occurs, thereby reducing the noise in the detector signal.