Gray (Gy)

Gray (Gy) is a unit used to measure the amount of radiation energy absorbed by a material, including human tissue. Specifically, one Gray equals the absorption of one joule of radiation energy per kilogram of matter. In medical treatments like radiation therapy, it helps quantify the dose of radiation delivered to target areas, ensuring effective treatment while minimizing damage to healthy tissue. Think of it as a way to measure how much energy the tissue absorbs, much like measuring how much heat is transferred to an object, but in terms of radiation energy.