Paper Info
Title
Framework for determination of geometric parameters of a cone beam CT scanner for measuring the system response function and improved object reconstruction
Abstract
We present a mathematical framework for image-based geometric calibration of flat-panel, cone-beam, circular-trajectory based computed-tomography (CT) scanners. The geometric parameters are used to determine the system response function corrected for misalignment. The system response function includes the shift-variant detector point response, and the location dependent response of the focal-spot. We propose a technique to automatically determine the relative geometric parameters of the scanner by including calibration marks on the object container. These parameters include the relative location and orientation of the detector and location of the focal-spot with respect to the object at each scanner rotation angle. The estimated parameters are used to determine the system response function and perform object reconstruction. Results of the system response function and object reconstruction with misalignment correction are provided, showing relevance of our mathematical framework and proposed technique
Year
DOI
Venue
2006
10.1109/ISBI.2006.1625151
Arlington, VA
Keywords
Field
DocType
calibration,computerised tomography,image reconstruction,medical image processing,flat-panel cone-beam circular-trajectory based computed-tomography scanners,geometric parameters,image-based geometric calibration,location dependent focal-spot response,misalignment correction,object reconstruction,shift-variant detector point response,system response function
Iterative reconstruction,Computer vision,Computer science,Beam (structure),Scanner,Artificial intelligence,Detector,Calibration
Conference
ISSN
ISBN
Citations 
1945-7928
0-7803-9576-X
0
PageRank 
References 
Authors
0.34
2
6
Name
Order
Citations
PageRank
Iacovos S. Kyprianou162.59
Sophie Paquerault2104.25
Brandon D. Gallas3187.78
Aldo Badano44115.90
Subok Park5124.33
Kyle J. Myers610822.21