International Commission on Radiation Units and Measurements
Encyclopedia
The International Commission on Radiation Units and Measurements (ICRU) is a standardization body set up in 1925 by the International Congress of Radiology. Its objective is to develop internationally acceptable recommendations for quantities
and units of radiation
and radioactivity, as well as associated measurement procedures and physical data.
Physical quantity
A physical quantity is a physical property of a phenomenon, body, or substance, that can be quantified by measurement.-Definition of a physical quantity:Formally, the International Vocabulary of Metrology, 3rd edition defines quantity as:...
and units of radiation
Radiation
In physics, radiation is a process in which energetic particles or energetic waves travel through a medium or space. There are two distinct types of radiation; ionizing and non-ionizing...
and radioactivity, as well as associated measurement procedures and physical data.