A measure of energy absorbed, equivalent to 100 ergs of energy absorbed per gram of material receiving ionizing radiation.
The unit used to measure the amount of ionizing radiation absorbed during X-ray procedures.
A unit of absorbed dose of ionizing radiation equal to an absorbed energy of 0.01 joule per kilogram of irradiated material.
A measure of ionizing radiation absorption, once replaced by the gray (Gy) unit. The term “rad” represents radiation absorbed dose.