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:
Jun. 22, 2004
Filed:
Aug. 27, 2002
Tetsuya Horiuchi, Tokyo, JP;
GE Medical systems Global Technology Company, LLC, Waukesha, WI (US);
Abstract
For the purpose of reducing exposure of a subject to unnecessary radiation by controlling the tube current according to the X-ray emitting direction with respect to a region to be examined in the subject, a transmission area S is calculated from a cross-sectional plane (S ) and an ellipticity R is calculated for the cross-sectional plane (S , S ). An image SD of a region having the transmission area S is then calculated (S ), and a SD ratio of a region having the ellipticity R is calculated (S ). An image SD of a region having the transmission area S and ellipticity R is then calculated using the image SD and the SD ratio (S ). Next, a target SD is specified (S ), and the tube current that controls X-rays emitted in the major-axis direction in the cross-sectional plane of the subject is calculated using the image SD obtained at S and the target SD (S ), and the tube current that controls X-rays emitted in the minor-axis direction in the cross-sectional plane of the subject is calculated using the obtained tube current and R (S ).