A method for correcting the beam hardening artifacts in fan beam axial computed tomography is presented. Using the projection data, the original CT image is reconstructed. The high density object is segmented from the original image. The original and high density images are reprojected individually to form projection data. The corrected projection data is approximated by evaluating the two projection data set. The correction image is reconstructed using the corrected projection data. The corrected CT image is formed by interpolating algorithm. Experimental results and certain analysis are given.