ICRU sphere

ICRU sphere is the name of a phantom introduced by the International Commission on Radiation Units and Measurement ( ICRU ) to simulate humans with regard to energy absorption through ionizing radiation .

This phantom consists of a tissue-equivalent sphere with a diameter of 30 cm with a density of 1 g cm ⁻³ and a mass composition of 76.2% oxygen , 11.1% carbon , 10.1% hydrogen and 2.6% nitrogen .

It serves the standardization of dose concepts in radiation protection .