@inproceedings{72697759a7bf4c44ab913b6ea31f9b7a,
title = "A Fast and Robust Calibration Method for Geometric Parameters of Cone-beam CT",
abstract = "At present, the cone-beam CT (CBCT) technology has been widely used in biomedical and non-destructive testing. The calibration of the geometric parameters of CBCT is the prerequisite for accurate image reconstruction. Inaccurate geometric parameters can lead to artifacts in reconstructed CBCT images and reduce the image quality. In order to obtain the geometric parameters of CBCT quickly and reliably, a calibration method for geometric parameters based on wire scanning is proposed in this paper. Firstly, a simple calibration tool is designed. Its basic structure is metal filament embedded in plexiglass tube. And then obtain a small amount of projections of the calibration tool with a single circular trajectory scanning, and superimpose the scanned projections. The coordinate of the beam center can be obtained by performing rotational axis fitting based on the symmetrical characteristics of the superimposed projection. After that, collect the projection after the calibration tool moves a certain distance, the distance between the focus and the rotation center, and the distance from the focus to the detector, are calculated according to the corresponding geometric relation of the calibration tool diameter and its projection. The simulation results and actual scan results show that the method can obtain the accurate geometric parameters of CBCT, which has the characteristics of a small amount of scanning, fast calibration speed and strong robustness. And it has been successfully applied in small focus CBCT and micro focus CBCT.",
keywords = "Calibration, Cone-beam CT, Edge detection, Geometric parameters",
author = "Hua Zhang and Caixin Zhang and Dinghua Zhang and Yin Dong and Taoqi Chang and Kuidong Huang",
year = "2017",
language = "英语",
series = "Lecture Notes in Engineering and Computer Science",
publisher = "Newswood Limited",
pages = "381--385",
editor = "Oscar Castillo and Craig Douglas and Ao, {S. I.} and Feng, {David Dagan} and Korsunsky, {A. M.}",
booktitle = "Proceedings of the International MultiConference of Engineers and Computer Scientists 2017, IMECS 2017",
note = "2017 International MultiConference of Engineers and Computer Scientists, IMECS 2017 ; Conference date: 15-03-2017 Through 17-03-2017",
}