Abstract: To analyze abnormal dose values of individual dose monitoring for radiation workers in some medical institutions in Jieyang City from 2020 to 2022, and to provide recommendations from three aspects, namely radiation workers, medical institutions as well as health administration and supervision, in order to reduce the abnormal monitoring data of individual dose and to reduce the risk of exposure to ionizing radiation for radiation workers. Individual dose monitoring results exceeding 1.25 mSv in a single monitoring cycle were collected from selected medical facilities in Jieyang from 2020 to 2022. Radiological workers with abnormal monitoring data were investigated and analyzed. A total of 100 abnormal dose values were identified from 2020 to 2021, with an abnormal rate of 1.27%, among which workers of diagnostic radiology accounted for 89%. 76% of abnormal dose values is mainly between 1.25 and 5 mSv. The first three causes of abnormal dose were that personal dosimeter had been retained in the radiation workplace (36.00%), that personal dosimeter had been worn while supporting patients receiving radiation examination (20.00%), and that the personal workload during wearing dosimeter increased significantly (13.00%). It is necessary to strengthen the protection consciousness of radiation workers and their awareness of the importance of personal dose monitoring, to improve the management system of radiation health and to strengthen the publicity and education, and to strengthen the health supervision and law enforcement, in order to reduce the incidence of individual dose abnormalies.

Key words: individual dose monitoring, abnormal, radiation worker