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| Analysis of 320 CTs' performance test and radiation protection test |
| ZHU Weijie1, XU Hui2, HAN Jun3, YU Jun3, CHEN Juan1 |
1. Peking University, School of Public Health, Beijing 100191 China;
2. National Institute for Radiological Protection, China CDC;
3. Beijing Center for Disease Prevention and Control |
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Abstract Objective To detect and analyze the performance and protection quality control of CT equipment in Beijing, and provide reference for improving the performance and protection quality of CT equipment and promoting the reasonable allocation of CT equipment in Beijing.Methods 320 CT equipment in Beijing were detected for performance status and radiation level respectively according rules and standards in GB 17589-2011 "Specifications for quality assurance test for computed tomography X-ray scanners" and GBZ 130-2013 "Requirements for radiological protection in medical X-ray diagnosis". SPSS 20.0 software was used for analysis.Results The testing results of 320 CT equipment's performance and protection quality showed that the qualified rate of performance test and protection test was both 99.7%, and the proportion of ≥ 64 rows CT increased by years.The comparison between imported CT and domestic CT revealed that, the high contrast resolution (high contrast algorithm) of imported CT was better than domestic CT (P=0.03), while the low contrast detectability index of domestic CTwas better than imported CT (P=0.03).Conclusion The qualified rate of CT equipment's performance and protection quality in Beijing was high, which should be credited to the persistently monitoring and constantly updated measures, such as "constancy test" and "networks monitoring". To optimize the CT equipment's allocation and improve the work efficiency, increasing the proportion of domestic CT and ≥ 64 rows CT could be considered.
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Received: 12 June 2019
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