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:
May. 24, 1994
Filed:
Jun. 09, 1993
Lutz Guendel, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A medical imaging apparatus includes a measurement unit with an x-ray source and a radiation detector rotatable around an examination subject to conduct a scan of the examination subject and thereby to obtain a data set, which is supplied to a computer. Within the computer, a shadowgraph of the examination subject is calculated in real time as the examination subject is displaced during the scan relative to the measurement unit. The data used to construct the shadowgraph are obtained at a selected projection angle, which is reached a number of times by the measurement unit during the scan. The shadowgraph is displayed in real time as well, to an extent correlated with the amount of relative displacement between the examination subject and the measurement unit. The shadowgraph can be calculated using a convolution equation, wherein the data are twice convolved, once in the longitudinal direction, i.e., the direction of displacement between the examination subject and the measurement unit, and once in a direction corresponding to the direction along which the radiation detector extends. A standard computer tomogram can also be calculated from the same data set from which the data for calculating the shadowgraph are selected.