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

摘要

Disclosed is a technique for quickly removing and correcting a cone-beam artifact generated in a computed tomography (CT) image in consideration of bone and soft tissue regions when using a large-area X-ray detector in order to reduce a CT imaging time for large volumes in a cone-beam CT system. An apparatus includes an input unit configured to receive a start image including a cone-beam artifact, a computation unit configured to separate a high-density material image and a low-density material image from the start image received by the input unit, generate a reproduced image in which the cone-beam artifact is reproduced using the low-density material image, execute a correction process for subtracting the reproduced image from the start image to generate a corrected image, and iterate the correction process using the corrected image as a start image; and an output unit configured to output a final corrected image generated.