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:
Oct. 03, 1978
Filed:
Mar. 25, 1977
Robert Justin Froggatt, Southall, GB;
EMI Limited, Hayes, GB;
Abstract
In therapeutic radiographic apparatus it is desirable to maintain the penetrating radiation in passing through tissue to be irradiated, rather than surrounding healthy tissue, despite movements of the patient. A shadowgraph radiographic picture of part of the patient is obtained by derivation from cross-sectional radiographic pictures from computerized axial tomography (CAT) apparatus. A similar shadowgraph picture is obtained, during therapy treatment, by collecting the therapy radiation after passing through the body. The two pictures are compared to determine the position of the therapy radiation relative to the tissue to be irradiated and the position is adjusted in response to the comparison.