Which measurement indicates the risk associated with radiation exposure to humans?

The measurement that indicates the risk associated with radiation exposure to humans is referred to as REM, which stands for Roentgen Equivalent Man. REM is a unit of measurement that accounts for the biological effects of different types of radiation on human tissue. It reflects the dose of radiation that takes into consideration the quality of the radiation and its potential impact on health, making it particularly relevant for assessing risk.

For example, while one gray (Gy) of X-ray exposure is considered the same as one gray of gamma radiation in terms of energy deposited, the biological effect might differ if other types of radiation (such as alpha particles) are involved. REM helps standardize these differences and gives a clearer picture of the potential harm from radiation exposure.

In contrast, RAD (Radiation Absorbed Dose) measures the amount of energy absorbed by tissue but does not take into account the type of radiation, making it less useful for assessing biological risk. MPD (Maximum Permissible Dose) refers to the maximum amount of radiation exposure a person can safely receive over a specified time frame. While MAD (Maximum Accumulated Dose) refers to the cumulative dose limit over a lifetime, neither of these measurements directly evaluates the risk of radiation exposure in the same way that REM does