What is the energy unit associated with the dose of radiation absorbed by tissue?

The energy unit associated with the dose of radiation absorbed by tissue is the Gray. The Gray is defined as the absorption of one joule of radiation energy by one kilogram of matter, specifically biological tissue in this context. This unit is critical in medical dosimetry as it quantifies the amount of ionizing radiation that a patient’s tissue has absorbed during treatment, allowing for the assessment and monitoring of radiation exposure levels and potential biological effects.

While the Joule is a unit of energy, it is not specifically tailored for measuring radiation dose in tissues, thus lacking the necessary context for biological absorption. The Sievert, on the other hand, is a unit for measuring the biological effect of radiation, which factors in the type of radiation and its impact on tissues. The Rem is another non-SI unit that also accounts for biological effects. However, these units are not specifically measuring the absolute absorbed dose which is where the Gray is specifically applicable. Understanding the distinction between these units is crucial in the field of medical dosimetry.