System and method for determining confidence measurements of single volume elements in computer tomography

摘要

A method for determining confidence values for volume units includes acquiring real projections of an object in a tomography system, reconstructing an image of the object from the real projections, generating artificial projections, for each volume unit comparing the real projections with the artificial projections and generating a confidence measure for each of the volume units.

主权项

1. A method for determining confidence values for voxels, the method comprising:
a) acquiring real projections of an object in a tomography system, wherein each real projection includes a plurality of pixel values, each pixel value corresponding to a respective penetrating-wave beam; and reconstructing an image of the object from the real projections, the image including a plurality of the voxels; b) generating a confidence value for each of the voxels by: computing a manifold of error measures for different penetrating-wave beams through the voxel, wherein each of the manifold of error measures is computed for one of the pixel values as a difference between the one of the pixel values and a summation of a product of a weighting factor and respective voxel values for voxels through which the respective penetrating-wave beam passes; building a histogram from the manifold of error measures; converting the histogram to a probability distribution; and deriving a characteristic value from this probability distribution.