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:
Sep. 10, 2019
Filed:
Oct. 13, 2016
Applicant:
Toshiba Medical Systems Corporation, Otawara-shi, JP;
Inventors:
Assignee:
Canon Medical Systems Corporation, Otawara-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05G 1/46 (2006.01); H01J 35/06 (2006.01); H01J 35/08 (2006.01); H05G 1/26 (2006.01);
U.S. Cl.
CPC ...
H05G 1/46 (2013.01); H01J 35/06 (2013.01); H01J 35/08 (2013.01); H05G 1/265 (2013.01);
Abstract
An X-ray diagnostic apparatus according to embodiments includes an X-ray tube assembly and a grid potential control circuitry. The X-ray tube assembly includes a filament that emits electrons, a target that generates X-rays by receiving the electrons, and a grid having a potential for adjusting a potential gradient around the filament. The grid potential control circuitry switches the potential of the grid to a potential where the potential gradient around the filament becomes greater than a potential gradient generated by a potential of the filament and a potential of the target.