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. 01, 2015
Filed:
Oct. 13, 2011
Hisashi Takahashi, Tokyo, JP;
Taiga Goto, Tokyo, JP;
Koichi Hirokawa, Tokyo, JP;
HITACHI MEDICAL CORPORATION, Tokyo, JP;
Abstract
In order to provide an X-ray CT apparatus and the like that reconstruct an image using an iterative approximation method which ensures stable convergence and can be executed at high speed, a computation deviceof an X-ray CT apparatuscalculates matrices A, B, D, R, and R' on the basis of the scanning conditions input through an input device(step). Then, the computation devicecalculates each element of a matrix I−α(SBDA+βSR) (step). Then, the computation devicecalculates the operator norm ∥I−α(SBDA+βSR)∥ of the matrix I−α(SBDA+βSR) (step). Then, the computation devicedetermines a relaxation coefficient α such that a predetermined conditional expression is satisfied (step).