摘要Objective:To evaluate the knowledge and practices of Moroccan physicians in terms of radioprotection of patients when prescribing computed tomography(CT)procedures.Methods:This is a cross-sectional study in which a questionnaire with 23 multiple-choice questions was sent to prescribers of CT examinations such as radiotherapists(RMs),other medical specialists(OMSs),general practi-tioners(GPs)and residents/interns(R/Is).The first eight questions asked about the demographics of the par-ticipants,while the remaining questions asked about knowledge of ionizing radiation examinations,doses received,relative risks,and patient radiation safety training.Results:A total of 223 physicians participated in this survey.Radiation therapists,considered as the reference group,had a better knowledge of irradiating and non-irradiating imaging compared to the other groups(P=0.003).Thus,67％of the reference group declared to take into account the number of scans performed by the patient during the last year,unlike the other groups(P=0.002).Furthermore,the knowledge of the different groups about the risks related to exposure to ionizing radiation was globally low(2％)(P=0.73).Regardless of their specialties and seniority,only 12％of the participants informed the patient at the time of prescription about the risks of X-rays.Finally,only 21％of the participants declared having had training in radiation protection,with no significant differences between the subgroups(P=0.832).Conclusions:The results obtained are similar to those reported in previous studies.They show that Moroccan prescribers have a low level of knowledge of the risks associated with CT examinations.Training on patient ra-diation protection should be included in the initial curriculum of interns and the continuing professional development of physicians should be reinforced.