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. 14, 2003
Filed:
Jul. 31, 2001
Applicant:
Inventor:
Tetsuya Horiuchi, Tokyo, JP;
Assignee:
GE Medical Systems Global Technology Company, LLC, Waukesha, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G21K 3/00 ;
U.S. Cl.
CPC ...
G21K 3/00 ;
Abstract
In order to obtain an X-ray tomographic image with high quality while minimizing the exposed dose to a subject by employing the most suitable filter according to the region of the subject to be scanned, a filter unit having filters having different transmission properties are provided below an X-ray tube in a gantry apparatus. To obtain an X-ray tomographic image, upon determining the scan region of the subject, a motor is driven to position one of the filters corresponding to the scan region just below the X-ray tube for employing the filter, and X-rays are applied to the subject through the filter.