INTRODUCTION: The imperativeness of establishing National Diagnostic Reference Levels (NDRLs) is important in Nigeria because it forms a comprehensive, concise and a powerful tool for optimizing radiation protection of patients. National diagnostic reference levels can be established by collaboration with radiographers across the country, the regulators, and professional bodies involved. The first step begins when each facility begins to set local, regional then national diagnostic reference levels.
OBJECTIVE: The objective of the study is to review literatures on existing Diagnostic Reference Levels (DRLs) for radiological examination, the methodologies of establishing them and then justify the need and reasons for establishing NDRLs in Nigeria.
METHODOLOGY: A systematic search through the internet, medline, web of science, Scopus, google scholar and manual search was conducted using search terms extracted from three terms DRLs, doses in radiological examination, DRLs in different countries. The search resulted in 90 articles in which 30 were included after a screening process.
RESULT: The combined search strategy identified 90 articles 6 identified from medline, 4 from Scopus, 5 from web of science and 15 from google scholar and manual search. The result showed that no comprehensive DRLs for radiological examination have been set for Nigeria.
CONCLUSION: There is need to establish local, regional and national DRLs in Nigeria as a tool for optimizing radiation protection.
Keywords: Diagnostic Reference Levels, Dose, Radiological Examination, Establish.
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