Method and system for reconstruction of tomographic images

A method for processing tomographic image data, comprising:nreconstructing a plurality of voxels from a set of scan data;asymmetrically regularizing at least some of the plurality of voxels, wherein the asymmetric regularization of each respective voxel is based at least in part on adjacent voxels to the respective voxel, wherein less weight is given to adjacent voxels further from a mid-plane of a detector used to acquire the set of scan data and wherein the mid-plane of the detector runs parallel to an axis about which the scan data is collected; andgenerating a final image when iterative reconstructing of the plurality of voxels or the set of updated voxels is determined to be complete.

A method for processing tomographic image data, comprising:nreconstructing a plurality of voxels from a set of scan data;deriving a respective regularization strength for each voxel based on the amount of image data available for the respective voxel, wherein the respective regularization strengths give less weight to adjacent voxels further from a mid-plane of a detector used to acquire the set of scan data, where the mid-plane of the detector runs parallel to an axis about which the scan data is collected;regularizing the plurality of voxels based on a model prior and the respective regularization strength for each voxel, wherein the regularization strength controls the strength of the model prior in regularizing the respective voxel and wherein the model prior includes expectations regarding the reconstruction; andgenerating a final image when iterative reconstructing of the plurality of voxels is determined to be complete.

A method for processing tomographic image data, comprising:nacquiring a plurality of projection rays during a CT scan;generating a respective proportional weight for one or more projection rays that passes outside a reconstruction volume, wherein the respective proportional weights give less weight to adjacent voxels further from a mid-plane of a detector used to acquire the plurality of projection rays, where the mid-plane of the detector runs parallel to an axis about which the projection rays are collected;reconstructing the plurality of projections rays to generate a plurality of reconstructed voxels, wherein the one or more projection rays that pass outside the reconstruction volume are weighted during reconstruction by the respective proportional weight; andgenerating a final image when iterative reconstructing of the plurality of reconstructed voxels is determined to be complete.

One or more non-transitory computer-readable media, encoding one or more routines which, when executed by a processor, cause the processor to perform acts comprising:nreconstructing a plurality of voxels from a set of scan data;asymmetrically regularizing at least some of the plurality of voxels, wherein the asymmetric regularization of each respective voxel is based at least in part on adjacent voxels to the respective voxel, wherein less weight is given to adjacent voxels further from a mid-plane of a detector used to acquire the set of scan data and wherein the mid-plane of the detector corresponds to an axis about which the scan data is collected; andgenerating a final image when iterative reconstructing of the plurality of voxels or the set of updated voxels is determined to be complete.

An image processing system, comprising:na memory storing one or more routines; anda processing component configured to execute the one or more routines stored in the memory, wherein the one or more routines, when executed by the processing component:nreconstruct a plurality of voxels from a set of scan data;asymmetrically regularize at least some of the plurality of voxels, wherein the asymmetric regularization of each respective voxel is based at least in part on adjacent voxels to the respective voxel, wherein less weight is given to adjacent voxels further from a mid-plane of a detector used to acquire the set of scan data and wherein the mid-plane of the detector corresponds to an axis about which the scan data is collected; andgenerate a final image when iterative reconstructing of the plurality of voxels or the set of updated voxels is determined to be complete.