Affiliations: Department of Medical Physics, University of
Wisconsin, Madison, WI, USA | Video Processing & Visual Perception, Philips
Research Laboratories, Eindhoven, The Netherlands | Department of Radiology, University of Pittsburgh,
Pittsburgh, PA, USA
Note: [] Corresponding author: Yi Wang, PhD, Radiology, University of
Pittsburgh, PUH, B804, 200 Lothrop Street, Pittsburgh, PA 15217, USA. Tel.: +1
412 647 6803; E-mail: wangy3@msx.upmc.edu
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.
