Title :
Backprojection-based imaging geometric parameter estimation
Author :
Zeng, Gengsheng L. ; Piatt, Jacob A.
Author_Institution :
Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, 84108, USA
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.
Keywords :
Calibration; Cities and towns; Computed tomography; Geometry; Image segmentation; Iterative algorithms; Mathematical model; Optical imaging; Parameter estimation; X-ray imaging; Algorithms; Brain; Humans; Image Enhancement; Image Interpretation, Computer-Assisted; Phantoms, Imaging; Reproducibility of Results; Sensitivity and Specificity; Tomography, Emission-Computed, Single-Photon;
Conference_Titel :
Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4244-1814-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2008.4649189
