METHOD AND APPARATUS FOR CORRECTING CONE-BEAM ARTIFACTS IN A CONE-BEAM COMPUTED TOMOGRAPHY IMAGE, CONE-BEAM COMPUTED TOMOGRAPHY APPARATUS INCLUDING THE SAME

摘要

In the present invention, when using a large-area X-ray detector to shorten the CT scan time for a large volume in a cone beam CT system, the cone beam artifact generated in the CT image is quickly removed and corrected in consideration of the bone area and the soft tissue area. As a technology for the method, an input unit that receives a start image containing a cone beam artifact, separates a high-density material image and a low-density material image from the start image received from the input unit, and generates a reproduced image in which the cone beam artifact is reproduced using the low-density material image. , And a calculation unit that performs a correction process of generating a corrected image by subtracting the reproduced image from the start image, and repeats the correction process using the corrected image as a start image, and an output unit that outputs a final corrected image generated by the calculation unit. .