Aiming at the current situation of medical equipment management, Shanghai Sixth People′s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine explored the application of 5G+ Internet of Things and digital twin technology in the intelligent management of medical equipment. Through the intelligent perception terminal, the hospital realized the dynamic acquisition of real data such as the use location, use process and use efficiency of medical equipment, and conducted digital, networked and intelligent monitoring and analysis. At the same time, applications such as medical equipment dynamic management software, medical equipment real-time positioning software, and space environment quality monitoring software were developed. It realized automatic, intelligent and visual management of medical equipment configuration, operation and performance evaluation, achieved fine management based on digital twins, and improved the efficiency of collaborative management of operational resource support.

Maintenance and quality control management of large medical equipment is 3-level qualitative index for performance appraisal of tertiary public hospitals, which affects their medical quality directly. Since 2015, Shanghai Medical Equipment and Device Management Quality Control Center and other government organizations have gradually established and improved the quality evaluation index system of large medical equipment maintenance in combination with China′s performance testing standards for large medical equipments and the technical requirements of various manufacturers, and putted the system into application. In 2018, the Quality Control Center further optimized the quality evaluation index system of large medical equipment maintenance by improving the maintenance sheet and service report of large medical equipments, using the " internet+ mobile terminal" to dynamically collect core data of equipment′s full cycle maintenance. This practice has established a regional database of large-scale medical equipment maintenance, building a comprehensive quantitative evaluation indexes. The maintenance quality evaluation scores of mainstream manufacturers of large medical equipments in Shanghai maintained an overall rising trend year by year, and the annual inspection compliance rate of CT and MRI maintenance quality has continued to increase from 2015 to 2021. This evaluation system enables the hospital management departments to supervise the manufacturers to complete their maintenance work at a high quality, ensure the safe operation of large medical equipments, and provide data reference and technical support for the qualitative evaluation of the maintenance quality of medium and large medical equipments in the " national examination" .

Objective To quantitatively study the influence of changes in probe position on the quality control test results of dental panoramic radiography and to provide a reference for analyzing the sources of deviations in quality control test results. Methods Eight different models of dental panoramic X-ray machines were selected for this study. The film analysis method was used to determine the position of the central axis of the main beam on the image detector. The position of the probe was accurately controlled through an auxiliary moving device. The tube voltage, radiation output, and half-value layer of the useful beam were measured for positions at the center of the beam; 1 cm upward, downward, left, and right from the center of the beam; and 2 cm upward, downward, left, and right from the center of the beam. Results The tube voltage, radiation output, and half-value layer had a maximum value at the center of the beam, with a decrease in the value as the position deviated from the center. There were significant differences in the probe position sensitivity between different models of dental panoramic radiography equipment. A 2 cm deviation in the probe position resulted in an impact on the measured tube voltage of less than 5.3 kV (5.8%) for less sensitive equipment. A 2 mm deviation in the probe position resulted in an impact on the measured tube voltage of less than 5.4 kV (6.0%) for sensitive equipment. Conclusion The probe position can lead to deviation in the quality control test results of dental panoramic photography. Therefore, determining the position of the central axis of the main beam on the image detector for accurate positioning of the probe is crucial for quality control testing.