Introduction: Despite widespread agreement that nuclear medicine is largely beneficial to patients when used for appropriate reasons, concerns have been expressed about the possibility that cancer could be caused by it because of the exponentially growing usage of high radiation exposure in medicine. The most crucial method for reducing this potential risk is to keep radiation exposure as low as reasonably possible (ALARA) while still performing the diagnostic work. Aim of the study: The common technical approaches for managing radiation exposure are outlined in this article. Future thoughts on dose reduction are discussed, along with dose-management measures. Methodology: The literature review is a comprehensive research of PUBMED since the year 1999-2020 Conclusion: Medical imaging has numerous crucial therapeutic applications and can have a big impact. However, there are dangers associated with CT, fluoroscopy, and nuclear medicine imaging methods. A well-rounded public health strategy aims to minimise the hazards while promoting the advantages of medical imaging. The FDA, other departments of the federal government, and the medical community can all contribute to such an approach. The FDA and our partners will seek to meaningfully reduce the unnecessary radiation exposure of patients during CT, fluoroscopy, and nuclear medicine imaging exams through the Initiative to Reduce Unnecessary Radiation Exposure from Medical Imaging. Keywords: Radiation exposure, measures to control radiation, nuclear medicine, CT Scan, ALARA