title: Backprojection-based imaging geometric parameter estimation.
abstract: In SPECT (single photon emission computed tomography) and X-ray CT, point sources are commonly used to acquire data for imaging parameter estimation. The parameters are estimated by fitting the point source projection data to a mathematical model of the imaging system. This paper introduces two backprojection-based parameter estimation methods. In the first method a point source is attached to the object; the second method is data-based without using a point source at all.
authors.affiliation: Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, UT 84108, USA. larry@ucair.med.utah.edu
authors.forename: Gengsheng L
authors.initials: GL
authors.lastname: Zeng
authors.forename: Jacob A
authors.initials: JA
authors.lastname: Piatt
mesh_terms: D000465:Algorithms; D001921:Brain / Q000000981:diagnostic imaging*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation / Q000379:methods*