Quality Control of Medical Digital X-ray System Equipment and Analysis of Current Situation of Radiation Protection in the Computer Room of Our Hospital

doi:10.7517/issn.1674-0475.191102

Abstract

Abstract: To analyze the quality control status of medical digital X-ray system (DR) equipment in our hospital and the current situation of radiation protection in the computer room. 5 DR equipment installed in our hospital and accepted and put into use by June 2019 were selected as the research object in this study. The quality control status of DR equipment was evaluated according to the test requirements and technical indicators of WS 521-2017 "quality control test specification for medical digital X-ray photography (DR) system", and the test according to GBZ 130-2013 "medical X-ray diagnostic radiation protection requirements". Requirements and technical indicators of the room radiation protection evaluation. Quality control test results show that:2 of the 5 DR equipments each have one test item which does not meet the requirements of national standards, the total qualified rate is 60.0%. Among the inspection indexes, there is one set for deviation of tube voltage indication, one set for deviation of light field and four sides of irradiation field, and the qualified rate is 80.0%. The half value layer of the useful wire harness, the repeatability of the output, the deviation of the verticality of the useful wire harness, the center of the light field and the irradiation field, the linearity of the output and the deviation rate of the exposure time indication are all 100.0%. The radiation protection test results of the machine room show that:6 of the 58 detection points in the 5 DR equipment rooms had leakage, the leakage rate was 10.3%. The results show that the unqualified rate of DR equipment quality control and detection in our hospital is high, and the risk of DR machine room leakage is also high. We still need to strengthen the quality control of DR equipment, improve the radiation safety management of the machine room, so as to ensure the quality of image aided diagnosis and the protection of radiation workers and the public from all unnecessary ionizing radiation in the process of radiation diagnosis and treatment.

Key words: medical digital X-ray photography system, quality control, room radiation protection, radiation

JIA Lingzhi, LU Ganjie. Quality Control of Medical Digital X-ray System Equipment and Analysis of Current Situation of Radiation Protection in the Computer Room of Our Hospital[J]. Imaging Science and Photochemistry, 2020, 38(3): 459-463.

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