CT质量管理及质量控制测试

QM and QC Testing of CT Scanners

目的探讨CT质量管理(Quality Management,QM)的意义,以及质量控制(Quality Control,QC)的测试方法,制定适合本科室的质量管理制度和质控检测流程。方法结合实际工作经验完善本科室CT质量管理制度,定期进行CT质量控制测试并设计简易测试方法。测试内容包括:水模平均CT值测试、CT值均匀性测试、噪声水平测试、高对比度分辨力测试、低对比度分辨力测试、距离测量功能准确性测试、容积测量功能准确性测试、角度测量功能准确性测试等。结果 CT质量控制测试方法,简单易行、实用有效。通过定期的测试可保证CT设备性能良好,并保证最优化CT检查。结论 CT机质量管理是一项复杂而重要的工作,可根据科室自身条件设计简单实用的方法,定期测试CT设备的性能,保障医疗安全。

Objective To discuss the importance of QM（Quality Management） and the QC（Quality Control） testing methodology for CT（Computed Tomography） scanners so as to formulate appropriate QA regulations and QC testing procedures for the department.Methods The QA regulations of CT scanners were optimized in the department according to practical work experience.Additionally,with deployment of the self-designed simple methodologies,QC testing of CT scanners was carried out on a regular basis from multiple aspects including the average CT value of water phantoms,uniformity of CT values,the level of noise,high-contrast and low-contrast resolutions as well as the accuracy of distance,volume and angle measurement.Results The QC testing methodologies of CT scanners have proven its effectiveness and feasibility,which ensured the best performance of CT scanners and optimized CT examinations.Conclusion QM of CT scanners is complex but of great importance.It is suggested to design an easy and simple testing methodology according to the practical conditions in the department.And performance testing of CT scanners should be performed on a regular basis in order to ensure the safety of medical examinations.