Scatter and beam hardening correction in computed tomography applications

摘要

A method of correcting scatter includes obtaining a voxellized representation (14) of a 3D image (12) of an object from a plurality of projection data (10). A single scatter profile for the object is calculated using the voxellized representation (14) of the 3D image (12) of the object. A total scatter profile for the object is determined using the single scatter profile (13) and an adjustment factor and the projection data (10) is corrected using the total scatter profile (15) to obtain a scatter corrected projection data (18). A beam hardening correction method includes simulating a number of attenuation data for an x-ray spectrum, at least one object material, and a detector spectral response. A function is fitted to the attenuation data to obtain an attenuation curve. A number of projection data (10) for an object are corrected using the attenuation curve to obtain a number of beam hardening corrected projection data. A corrected image of the object is reconstructed from the beam hardening corrected image data. <IMAGE>