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:
Jul. 27, 1976
Filed:
Aug. 02, 1974
Manfred Pfeiler, Erlangen, DT;
Gerhard Linke, Erlangen-Frauenaurach, DT;
Siemens Aktiengesellschaft, Erlangen, DT;
Abstract
An X-ray diagnostic installation for producing a transverse layer or planigraphic image including a first X-ray measuring arrangement having X-ray source which generates an X-ray beam whose extent of cross-sectional diffusion perpendicular to the layer is equal to the layer thickness, and equal to or less than the layer thickness in parallel to the layer, and a radiation receiver which measures the radiation intensity behind the object at successive equidistantly located points, as well as a drive arrangement for the measuring arrangement adapted to generate a linearly guided scanning motion extending in perpendicular to the direction of the central beam across the total expanse of the object, in an alternating sequence with a rotational motion about small equidistant angles, whose sum comprises 180.degree., and about a center of revolution lying approximately in the central portion of the layer surface on the main radiation beam. In addition to the first measuring arrangement, a second measuring arrangement is provided which is parallel offset with respect to the former in the direction of the linear movement, whose X-ray source generates radiation having a different value of radiation energy in comparison with that of the first X-ray source; and including a calculator which determines for each image point from the measuring signals of both measuring arrangements for the two different values the radiation energy, the two adsorption coefficients or their proportional magnitudes, forms their respective quotients and from the foregoing, by means of a computed-in calibrating table provides the median ordinate value or a corresponding magnitude for each image point.