Evaluation of awareness and knowledge of CT technologist regarding diagnostic reference levels in Iran

Abstract

The purpose of this study was to determine the level of knowledge and awareness regarding radiation protection and Dose Reference Levels (DRLs) among 102 Computed Tomography (CT) technologists working in various Iranian hospitals. A questionnaire including 20 multiple-choice and open-format questions was divided into demographic information, general radiation protection knowledge, and DRL knowledge. Regarding radiation protection knowledge concerning CT, about 56.9% of participants exhibited awareness of the dose display on the CT machine’s console, and about 78.4% selected the correct dosimetric units expressed CT dose. Unexpectedly, 90.2% of participants failed to define the concept of dose optimization. A significant association (p < 0.05) was established between technologists’ radiation protection and DRL knowledge and a degree of education, type of hospital, and job experience. In addition, the findings reveal a correlation between radiographers’ DRL knowledge and their propensity to enroll in training courses. 26.5% of participants exhibited awareness of DRLs in CT practice, while 49% and 76.5% of participants were unable to correctly identify DRLs concept and function. To reduce patient dose in accordance with the As Low As Reasonably Achievable (ALARA) radiation protection principle, CT technologists must improve their knowledge of radiation dose and local DRLs should be defined at least at the local level.