Aim: References values (RVs) remain being utilized for the radiation quantities from specific bits of radiography apparatus to doses from comparable equipment evaluated in nationwide reviews. RVs optional through American Connection of Physicists in Medicine were established from General Assessment of X-ray trends review, which was conducted by government radiation defense services through understanding and also encouragement of United States Food and Drug Government, Symposium of Radioactivity Control Program Executives, and also American College of Radiology. The RVs used by the American Association of Physicists in Medicine approximate 90th percentile of questionnaire results. As a result, hardware that exceeds the RVs uses higher radiation doses than 90% of apparatus in studies. Radioactive quantities for precise projects should be monitored yearly using standardized ghosts, as suggested through USA College of Radiology. Whenever RVs remain reached, medical physicist must examine source too, in collaboration through radiologist in charge, evaluate if such dosages are warranted or even if the imaging equipment must be adjusted to decrease individual radiation quantities. RVs remain important instruments for likening individual radiation exposures across the UK and giving details concerning radiography performance and reliability. Keywords: Diagnostic radiology, Reference Values, Importance, impacts.