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. 01, 2012
Filed:
May. 26, 2010
Yuichi Kasuya, Tochigi-ken, JP;
Yuichi Kasuya, Tochigi-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Medical Systems Corporation, Otawara-shi, JP;
Abstract
An X-ray CT apparatus includes a fixed gantry having a plurality of stator coils arranged in a circle and mounted on the fixed gantry. A ring-shaped rotation frame of the CT apparatus includes a plurality of rotor magnets facing the plurality of stator coils. The CT apparatus further has an X-ray tube and an X-ray detector situated on the rotation frame to face each other and a supporting unit configured to provide non-contact support of the rotation frame on the fixed gantry. A magnetic pole detection unit of the apparatus is configured to detect a magnetic pole position of the rotor magnet at a start-up time of the plurality of stator coils and a brake mechanism of the apparatus is configured to apply a brake load to the rotation frame when detecting the magnetic pole position and to remove the brake load after detecting the magnetic pole position.