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. 31, 2017
Filed:
Feb. 26, 2015
Toshiba Medical Systems Corporation, Otawara-shi, JP;
Qiulin Tang, Mundelein, IL (US);
Satoru Nakanishi, Arlington Heights, IL (US);
TOSHIBA MEDICAL SYSTEMS CORPORATION, Otawara-shi, JP;
Abstract
An apparatus and method of processing cone-beam X-ray projection data using a short-scan method (e.g., filtered back projection and weighting the projection data using the Parker weights for projection angles spanning 180° plus the fan angle) to reconstruct an image. Imaging artifacts in the short-scan image are corrected by combining the short scan image with a correction image. The correction image is obtained by applying an asymmetric filter to the difference between the short-scan image and a full-scan image, the full scan image being obtained using image reconstruction of the full-scan projection data. In one implementation, the asymmetric filter is a low-pass filter that, in the spatial domain, is foreshortened along a center-view axis corresponding to the short scan.