SI Units in radiology and radiation measurement

Abstract

After a considerable time spent on preparatory work, the International Commission on Radiation Units and Measurements (I.C.R.U.) over the period 1953–62 presented its definitions of the quantities absorbed dose, exposure and activity and the corresponding special units 1 rad, 1 röntgen (1R) and 1 curie (1 Ci). They are now generally accepted in the whole field of radiology and radiation protection for routine use although certain misuse of some of these quantities is still noticed.