Abstract: Objective: To investigate knowledge, attitude and practice of radiation protection among medical staff in nuclear medicine department and to analyze the influencing factors, so as to provide the basis for standardizing the radiation protcetion behavior of medical staff and enriching the training content of radiation protection. Methods: A self-designed questionnaire on KAP of radiation protection was used to investigate the medical staff in nuclear medicine department, and multiple linear regression was used to analyze the factors affecting KAP of radiation protection. Results: A total of 123 valid questionnaires were collected, and the effective recovery rate was 94.62%. The total score of the radiation protection KAP questionnaire for medical staff in nuclear medicine department is 76.92; the knowledge score is 57.69; the attitude score is 95.24; and the behavior score is 83.33. The results of multiple linear regression analysis showed that if medical staff had children and whether they regularly attended radiation protection training were the influencing factors of radiation protection KAP score (P<0.05). Conclusions: Medical staff in nuclear medicine department have a good level of KAP about radiation protection, and their attitude and behavior are positive, but their knowledge of radiation protection is insufficient. Relevant organizations and agencies should regularly organize radiation protection training and education, in order to improve medical staff's knowledge level of radiation protection, and form positive attitudes and behaviors.

Key words: nuclear medicine, radiation protection, knowledge, attitude, practice