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. 05, 2000
Filed:
Jan. 12, 1999
Applicant:
Inventor:
Ching-Ming Lai, Wakefield, MA (US);
Assignee:
Analogic Corporation, Peabody, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H61B / ;
U.S. Cl.
CPC ...
378-4 ; 378901 ; 382131 ;
Abstract
In a method and apparatus for progressive correction of ring artifacts in a computed tomography system, multiple-channel ring artifacts are mitigated or eliminated along with single-channel ring artifacts. Detector channels are iteratively grouped into various size groupings, for example, pairs, and the offset error values of each detector channel grouping are determined. The error values corresponding to each detector channel are accumulated at each iteration, and the final accumulated values are applied to captured projection data. In this manner, ring artifacts can be eliminated from the image in just a few iterations.