Research on detection analysis of CT quality control
10.3969/J.ISSN.1672-8270.2016.01.037
- VernacularTitle:CT质量控制检测分析
- Author:
Xiaofeng DUAN
;
Yongshou ZHANG
- Publication Type:Journal Article
- Keywords:
CT scanner;
Quality assurance;
Detection method;
Quality control
- From:
China Medical Equipment
2016;13(1):119-121
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To used the internationally accepted methods of CT quality assurance for testing their quality, to maintain the normal operation of CT scanner and guarantee the quality of photographic image.Methods: Toshiba Activion 16 row CT, set the scanning conditions: tube voltage 120 kv, 310 mas exposure, scan time is 0.33 s, scanning layer thickness: 10 mm, 5 mm, 1.5 mm, view(FOV) 150 mm×150 mm, 512 x 512 reconstruction matrix. We measured the following performance parameters for CT spatial resolution, low contrast resolution,uniformity and noise with Catphan500 phantom made by the phantom laboratory of U.S.A.Results: The spatial resolution, low contrast resolution, uniformity and noise of the CT are all in line with the requirements. Obtained by detecting the X-ray dose, pixel, the thickness of the above parameters are affected, but also the interaction between the above parameters simultaneously.Conclusion: By detecting the spatial resolution, low contrast resolution of medical image, we can effectively guarantee system performance, maintaining optimal image quality.
