Construction of evaluation index system for reliability of MR equipment / 中国医学影像技术

ABSTRACT

Objective: To establish an evaluation index system for reliability of MR equipment, and to observe the weights of all indicators, so as to provide standards for Objective: and quantitative evaluation of different types of MR equipment. Methods: The indicators were selected by using literature analysis and Delphi method, and the weights of indicators (W) were calculated using analytic hierarchy process. Results: The questionnaire recovery rates for two rounds of expert consultation were 91.30% (21/23) and 93.75% (30/32), and authority coefficient were 0.89 and 0.98, respectively. The Kendall's W of indicators' importance at all levels were 0.524, 0.632 and 0.404 (all P<0.001), while of indicators' feasibility were 0.259, 0.209 and 0.216, respectively (all P<0.001). A three-level evaluation index system was established with 2 first-level indicators, 6 second-level indicators and 31 third-level indicators and passed the consistency test. Conclusion: The evaluation index system of MR equipment reliability is scientific and applicable, which may provide a quantitative basis for evaluation and continuous improvement of reliability of MR equipment.