Cone-beam CT reconstruction based on circular scan trajectory and ring artifact reduction.
- Author:
Jun YANG
1
;
Xin ZHEN
;
Wen-ting LU
;
Ling-hong ZHOU
Author Information
1. School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China. 458yj@163.com
- Publication Type:Journal Article
- MeSH:
Algorithms;
Artifacts;
Cone-Beam Computed Tomography;
methods;
Particle Accelerators
- From:
Journal of Southern Medical University
2009;29(12):2379-2382
- CountryChina
- Language:Chinese
-
Abstract:
The FDK algorithm is one of the most widely used algorithms for cone-beam CT reconstruction in circular trajectory due to its simplicity of implementation and computational efficiency. However, the images reconstructed by the FDK algorithm based on real projection data may be blurred without electronic correction and geometric calibration, and are often plagued by deleterious ring artifacts and shading artifacts. We compared the images reconstructed with and without detector correction based on computer experiment of the real biological object. The experimental simulation shows that these algorithms are effective in reducing the ring artifact without compromising the image resolution, and produce satisfactory results.
