A MULTILEVEL DOMAIN DECOMPOSITION METHOD FOR FAST REPROJECTION OF IMAGES

摘要

The present method is a process for reprojecting, or computing tomographic projections of an image (12), based on multilevel image domain decomposition. The method includes decomposing an image (12) into one or more sub-images (20), followed by reprojection of the sub-images (12) into sinogram (22), appropriate scaling of the sinograms, and aggregation of the sub-image sinograms (28) into a single sinogram (14) of the entire image (12). The multilevel process attains image quality comparable to that of direct reprojection method, while requiring much less computation, and therefore being much faster.