What does 'acute exposure' to radiation signify?

'Acute exposure' to radiation refers to high level exposure that occurs over a short duration. This type of exposure is characterized by a significant dose of radiation received in a brief moment, often leading to immediate biological effects. It is distinct from chronic exposure, which involves lower levels of radiation over an extended period, and can result in different health outcomes and risks. Understanding acute exposure is crucial because it often leads to acute radiation syndrome, which may manifest with symptoms such as nausea, vomiting, and a range of severe health effects depending on the intensity of the exposure.