Abstract
A generally applicable calibration algorithm is developed for dual energy material decomposition in digital x-ray based imaging. The following two facts are employed: 1) the constancy of the difference between the low and high energy intensities when there is no attenuation material and 2) the existence of boneless regions in field of view. Scatter correction is optimally incorporated into the calibration algorithm by requiring that the scatter correction on measured boneless data is consistent with the scatter-free body matrix. Experiments in dual chest radiography demonstrated that the new calibration was feasible, the image scatter noise was reduced, and the automated 2D decomposition generated material selective images similar to previous manual decomposition.
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