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:
Nov. 13, 1979
Filed:
Mar. 08, 1977
Reiner Liebetruth, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
In order to facilitate exact positioning of a patient relative to tomographic X-ray apparatus the patient is moved longitudinally of the apparatus and the apparatus is retained in a limited angular relationship and operated to produce successive sets of transmittance readings to define a radiographic image having a longitudinal extent sufficient to encompass the precisely desired region of the patient for which a tomographic image is to be generated. The stored sets of readings may be reproduced on a conventional television display unit along with suitable reference means coordinated with the patient's longitudinal position in the apparatus. The radiograph even though taken in a single angular relationship can still provide sufficient information to permit selection of the precise desired patient longitudinal position relative to the tomographic apparatus, whereupon the tomographic apparatus is operated in the usual manner for scanning of the selected transverse layer over a wide range of angles but with a fixed relative longitudinal relationship. Advantageously, the scanner may present a fan-type beam which in a fixed angular relationship to the patient still scans a substantial portion of the patient cross section, the X-ray source or sources being pulsed at successive longitudinal positions of the patient relative to the scanning apparatus, and the successive sets of readings being utilized for on line display of a radiograph covering the desired longitudinal extent.