Methods and apparatus for scatter correction for CBCT system and cone-beam image reconstruction

摘要

Embodiments of methods and/or apparatus for 3-D volume image reconstruction of a subject, executed at least in part on a computer for use with a digital radiographic apparatus, can obtain image data for 2-D projection images over a range of scan angles. For each of the plurality of projection images, an enhanced projection image can be generated. In one embodiment, a first scatter intensity distribution through the plurality of projection images can be modulated based on a first scaling function and a SPR to generate a second scatter intensity distribution through the plurality of projection images, which can be combined with the original plurality of projection images.

主权项

1. A computer implemented method comprising:
capturing an image of an object using an x-ray source emitting x-rays toward the object and a detector capturing image data of the object; modifying the captured image to correct artifacts therein caused by scattering of the x-rays, the step of modifying the image including:
determining a scatter distribution of the x-rays in an air region near the object using the captured image of the object;estimating a scatter intensity of the x-rays within the object based on the determined scatter distribution;andsubtracting the estimated scatter intensity of the x-rays from the captured image to provide the modified image.