Title :
Geometric calibration of cone-beam CT with a flat-panel detector
Author :
Wu, Dufan ; Li, Liang ; Zhang, Li ; Xing, Yuxiang ; Chen, Zhiqiang ; Xiao, Yongshun
Author_Institution :
Dept. of Eng. Phys., Tsinghua Univ., Beijing, China
Abstract :
Here we proposed a method to calibrate several important geometric parameters for cone-beam CT (CBCT) systems. Only three point-like objects and their spatial distances are required for the calibration. Our method is based on the analysis of the ellipse trajectories of the points´ projections. Our mathematical expressions are much simpler than similar methods and our method yields better stability. The calibration procedure has been tested on numerical simulations and an actual micro-CT system.
Keywords :
calibration; computerised tomography; geometry; actual microCT system; cone-beam CT system; ellipse trajectories; flat-panel detector; geometric calibration; numerical simulations; point-like objects; spatial distance; Calibration; Detectors; Trajectory;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
Print_ISBN :
978-1-4673-0118-3
DOI :
10.1109/NSSMIC.2011.6152527
