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:
Dec. 31, 2013
Filed:
Sep. 08, 2011
Jean-daniel Leroux, Sherbrooke, CA;
Marc Dumoulin, Sherbrooke, CA;
Roger Lecomte, Sherbrooke, CA;
Réjean Fontaine, Sherbrooke, CA;
Jean-Daniel Leroux, Sherbrooke, CA;
Marc Dumoulin, Sherbrooke, CA;
Roger Lecomte, Sherbrooke, CA;
Réjean Fontaine, Sherbrooke, CA;
SOCPRA—Sciences Sante et Humaines, s.e.c., Sherbrooke, Quebec, CA;
Abstract
An image reconstruction system and method based on image projection data collected by an imaging system having N tubes of response (TORs) having Naxial translation symmetries and Nin-plane rotation symmetries between the TORs. A system matrix mapping image projection data to pixels of an image is used, where the pixels are positioned according to a polar or cylindrical coordinate grid. During image reconstruction, matrix-vector computations are performed between the system matrix and vectors containing image estimates or image projection estimates. The matrix-vector computations are accelerated by structuring the system matrix coefficients, image vectors, and projection measurement vectors in such a way that symmetric data is stored in contiguous memory locations. Further, instead of storing the coefficients for all TOR and voxel combinations, matrix coefficients for only the subset of non-symmetric TOR and voxel combinations are stored, and the same coefficients are reused for the other symmetric TOR/voxel combinations.