Diagnostic radiography students' experiences of a practical method demonstrating the effect of milliampere-second in digital X-ray imaging systems

Abstract

BackgroundThe effect of exposure technique factors varies between analogue and digital X-ray imaging systems (DR). Understanding these variations is paramount to optimising radiation protection, yet radiographers are unclear about these effects. A practical method to demonstrate milliampere second (mAs) effect in DR was developed to assist diagnostic radiography students in understanding exposure technique factors in DR. ObjectivesTo explore second-year diagnostic radiography students' experiences of a practical method to demonstrate the effect of mAs in DR. MethodsA qualitative research approach employing an open-ended questionnaire explored second-year diagnostic radiography students' experiences of the practical method demonstrating the effect of mAs in DR. Twenty students participated in the study, and the data collected underwent thematic analysis. ResultsStudents appreciated working in small groups and provided suggestions to improve the practical method's instruction sheet. Most students' predicted outcome differed from the actual outcome of the demonstration. Seeing and documenting the effect of mAs in DR not only enhanced students' understanding of it but showed the implications of increasing mAs on image quality and radiation exposure. ConclusionStudents found that the practical method enhanced their understanding of mAs and exposure technique factors in DR. Additionally, the practical method highlighted exposure creep in DR and radiographers' role in protecting patients from overexposure to ionising radiation in the digital era.