Computed tomography method, and system

摘要

A computed tomography method for determining a volumetric representation of a sample comprising reconstruction initial volume data of the sample from x-ray projections of the sample taken by an x-ray system, determining a part of the reconstructed initial volume data to be updated, and executing an iterative update process configured to generate, using an iterative reconstruction method, updated volume data only for the part of the volume data determined to be updated. Determining the part of the sample volume to be updated comprises individually evaluating every single voxel in the reconstructed initial volume data, based on available quality information for the reconstructed initial volume data, whether or not the voxel fulfils a predetermined condition indicating that an update is required for the voxel, and the iterative update process generates the updated volume data only for the voxels which have been determined that an update is required.

主权项

1. A computed tomography method for determining a volumetric representation of a sample, comprising:
reconstructing initial volume data of the sample from x-ray projections of the sample taken by an x-ray system; determining a part of the reconstructed initial volume data to be updated; and executing an iterative update process configured to generate, using an iterative re-construction method, updated volume data only for the part of the reconstructed initial volume data determined to be updated, wherein determining the part of the reconstructed initial volume data to be updated comprises individually evaluating every single voxel in the reconstructed initial volume data, based on available quality information for the reconstructed initial volume data, whether or not the voxel fulfils a predetermined condition indicating that an update is required for the voxel, wherein the iterative update process generates updated volume data only for the voxels which have been determined that an update is required, and wherein the method further comprises determining, from process data of initial reconstructing of initial volume data of the sample and/or calculating update values, individual confidence measures for every single voxel of the reconstructed initial volume data.