What does an acute dose of radiation refer to?

An acute dose of radiation refers to a significant exposure to radiation that occurs over a short period, typically within minutes or hours. This type of exposure can lead to immediate health effects, such as radiation sickness, depending on the dose received. Acute doses are often measured in grays (Gy) or sieverts (Sv), and the severity of the effects can vary based on the amount of radiation absorbed by the body.