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:
May. 29, 2007
Filed:
Jul. 27, 2004
Ram Naidu, Waban, MA (US);
Zhengrong Ying, Wakefield, MA (US);
Chitra Subramanian, Salem, MA (US);
Sergey Simanovsky, Brookline, MA (US);
Carl R. Crawford, Brookline, MA (US);
Ram Naidu, Waban, MA (US);
Zhengrong Ying, Wakefield, MA (US);
Chitra Subramanian, Salem, MA (US);
Sergey Simanovsky, Brookline, MA (US);
Carl R. Crawford, Brookline, MA (US);
Analogic Corporation, Peabody, MA (US);
Abstract
A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner to scanner variations due to the beamline component differences. The method uses a copper filter mounted on the detector array for tracking the spectral changes. The method comprises: generating copper ratios; computing working air tables; calculating scales and offsets; and correcting high-energy CT images and Z images using calculated scales and offsets. The method further includes an off-line calibration procedure to generate necessary parameters for the online correction.