“…First, relevant data involving the renewal of large medical equipment were studied, and the indicators related to the equipment were initially screened. Subsequently, experts engaged in medical equipment management and hospital management were consulted using the Delphi method ( 22 , 23 ), and the initially selected evaluation indicators were refined and perfected from the 20 indicator datasets based on the criteria of high sensitivity and collectability of the indicators. Finally, the evaluation index system was constructed from four aspects, namely, operation guarantee, social benefits, technical indicators ( 24 ) and economic benefits, in order to comprehensively evaluate the performance, efficiency and effectiveness of the equipment in actual operation, and to provide a more comprehensive and objective basis for the decision-making of equipment renewal, as shown in Table 1 .…”