Patent ID: 7840053

Claim:
A method to reduce artifacts in limited data tomography, comprising: (a) providing an algebraic reconstruction technique algorithm including at least two iterative steps; (b) establishing a high threshold parameter and a low threshold parameter; (c) setting a current threshold value of a transformation equal to the high threshold parameter; (d) applying one iterative step of the algebraic reconstruction technique algorithm resulting in reconstructive values; (e) determining if the reconstructive values of the algebraic reconstruction technique algorithm are less than the current threshold value of the transformation; (f) changing the reconstructive values to equal the current threshold value of the transformation; (g) decreasing the current threshold value of the transformation slightly toward the low threshold parameter; (h) repeating the steps (d) through (g) until the current threshold value of the transformation reaches below the low threshold parameter; and (i) displaying the reconstructive values as an image.