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. 29, 2020
Filed:
Nov. 02, 2018
The University of Chicago, Chicago, IL (US);
Canon Medical Systems Corporation, Otawara-shi, JP;
Xiaochuan Pan, Chicago, IL (US);
Zheng Zhang, Chicago, IL (US);
Dan Xia, Chicago, IL (US);
Yu-Bing Chang, Albany, NY (US);
Jingwu Yao, Buffalo Grove, IL (US);
Joseph Manak, Albany, NY (US);
THE UNIVERSITY OF CHICAGO, Chicago, IL (US);
CANON MEDICAL SYSTEMS CORPORATION, Otawara-shi, JP;
Abstract
An apparatus and method are provided for computed tomography (CT) imaging to reduce artifacts due to objects outside the field of view (FOV) of a reconstructed image. The artifacts are suppressed by using an iterative reconstruction method to minimize a cost function that includes a de-emphasis operator. The de-emphasis operator operates in the data domain, and minimizes the contributions of data inconsistencies arising from attenuation due to objects outside the FOV. This can be achieved by penalizing images that manifest indicia of artifacts due to outside objects especially those outside objects have high-attenuation densities and minimizing components of the data inconsistency likely attributable to the outside object.