Design and optimization of a cone-beam CT system for extremity imaging.

Kun MA; Mingqiang LI; Xi Tao; Dong Zeng; Yongbo Wang; Zhaoying Bian; Ziquan Wei; Gaofeng Chen; Qianjin Feng; Jianhua MA; Jing Huang

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Design and optimization of a cone-beam CT system for extremity imaging.

Author: Kun MA ¹ ; Mingqiang LI ¹ ; Xi TAO ¹ ; Dong ZENG ¹ ; Yongbo WANG ¹ ; Zhaoying BIAN ¹ ; Ziquan WEI ¹ ; Gaofeng CHEN ¹ ; Qianjin FENG ¹ ; Jianhua MA ¹ ; Jing HUANG ¹
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1. School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China.
Publication Type:Journal Article
Keywords: cone beam computed tomography; extremity imaging; geometrical calibration; hardware system; image reconstruction
MeSH: Algorithms; Animals; Artifacts; Calibration; Cone-Beam Computed Tomography; instrumentation; methods; Equipment Design; Extremities; diagnostic imaging; Image Processing, Computer-Assisted; methods; Phantoms, Imaging; Radiographic Image Enhancement; instrumentation; methods; Swine
From: Journal of Southern Medical University 2018;38(11):1331-1337
CountryChina
Language:Chinese
Abstract: OBJECTIVE:To establish a cone beam computed tomography (ECBCT) system for high-resolution imaging of the extremities.
METHODS:Based on three-dimensional X-Ray CT imaging and high-resolution flat plate detector technique, we constructed a physical model and a geometric model for ECBCT imaging, optimized the geometric calibration and image reconstruction methods, and established the scanner system. In the experiments, the pencil vase phantom, image quality (IQ) phantom and a swine feet were scanned using this imaging system to evaluate its effectiveness and stability.
RESULTS:On the reconstructed image of the pencil vase phantom, the edges were well preserved with geometric calibrated parameters and no aliasing artifacts were observed. The reconstructed images of the IQ phantom showed a uniform distribution of the CT number, and the noise power spectra were stable in multiple scanning under the same condition. The reconstructed images of the swine feet had clearly displayed the bones with a good resolution.
CONCLUSIONS:The ECBCT system can be used for highresolution imaging of the extremities to provide important imaging information to assist in the diagnosis of bone diseases.