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:
Apr. 15, 2003
Filed:
Sep. 26, 2000
Masao Iinuma, Osaka, JP;
Hajime Takemoto, Saitama, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
An X-ray tube ( ) is rotated about its focal point along a plane perpendicular to a body axis of a patient by an X-ray tube rotation driver and thus the X-ray irradiation field moves. When the side of the X-ray irradiation field reaches an edge detector ( ) in the edge part of the flat panel detector, the edge detector detects X-ray and provides a signal to a controller. The controller controls the X-ray limiting device ( ) to move shield blades thereof to limit the range of the X-ray irradiation field. The above structure makes it possible to move the center of the X-ray irradiation field without moving the patient and also to prevent the X-ray irradiation field from going outside of the flat panel detector.