METHOD FOR REDUCING METAL ARTIFACT FROM X-RAY IMAGE

摘要

PURPOSE: A method for reducing a metal artifact from an X-ray image is provided to obtain a clear X-ray image by removing the metal artifact due to an artificial prosthetic device or filler from a teeth X-ray image. CONSTITUTION: An initial re-composition image is obtained from X-ray projection data(S100). A metal image is separated from the initial re-composition image(S200). A first correction re-composition image is obtained by interpolating a first missing region(S300). A second correction re-composition image is obtained by a smoothing method(S400). First re-projection data is obtained by re-projecting a second correction re-composition image(S500). Second re-projection data is obtained by interpolating the first re-projection data(S600). A final re-composition image is completed by assembling the finial re-composition image and the metal image(S800).