(ARS) The acute radiation syndrome is a form of radiation sickness. An acute radiation syndrome can be developed after the exposition to a high radiation dose received in a short period of time (e.g., x-rays or gamma rays). ARS subsyndromes include hematopoietic, cutaneous, gastrointestinal, and neurovascular diseases. The reaction will vary with dose and factors like age, medical co-morbitdity and immunosuppression.

The acute dose is the amount of energy accommodated in human tissue or in biological systems.

See also Acute Exposure, Acute Radiation Syndrome, Biodosimetry and Annual Limit On Intake.