title: Maximum-Likelihood Calibration of an X-ray Computed Tomography System.
abstract: We present a maximum-likelihood (ML) method for calibrating the geometrical parameters of an x-ray computed tomography (CT) system. This method makes use of the full image data and not a reduced set of data. This algorithm is particularly useful for CT systems that change their geometry during the CT acquisition, such as an adaptive CT scan. Our ML search method uses a contracting-grid algorithm that does not require initial starting values to perform its estimate, thus avoiding problems associated with choosing initialization values.
authors.affiliation: J.W. Moore is with the College of Optical Sciences, R. Van Holen is with MEDISIP, Department of Electronics and Information Systems, Ghent University, B-9000 Ghent, Belgium and L.R. Furenlid and H.H. Barrett are with the Department of Radiology and College of Optical Sciences, University of Arizona, Tucson, AZ 85724 USA.
authors.forename: Jared W
authors.initials: JW
authors.lastname: Moore
authors.affiliation: J.W. Moore is with the College of Optical Sciences, R. Van Holen is with MEDISIP, Department of Electronics and Information Systems, Ghent University, B-9000 Ghent, Belgium and L.R. Furenlid and H.H. Barrett are with the Department of Radiology and College of Optical Sciences, University of Arizona, Tucson, AZ 85724 USA.
authors.forename: Roel
authors.initials: R
authors.lastname: Van Holen
authors.affiliation: J.W. Moore is with the College of Optical Sciences, R. Van Holen is with MEDISIP, Department of Electronics and Information Systems, Ghent University, B-9000 Ghent, Belgium and L.R. Furenlid and H.H. Barrett are with the Department of Radiology and College of Optical Sciences, University of Arizona, Tucson, AZ 85724 USA.
authors.forename: Harrison H
authors.initials: HH
authors.lastname: Barrett
authors.affiliation: J.W. Moore is with the College of Optical Sciences, R. Van Holen is with MEDISIP, Department of Electronics and Information Systems, Ghent University, B-9000 Ghent, Belgium and L.R. Furenlid and H.H. Barrett are with the Department of Radiology and College of Optical Sciences, University of Arizona, Tucson, AZ 85724 USA.
authors.forename: Lars R
authors.initials: LR
authors.lastname: Furenlid