Which unit is commonly used for radiation dose measurement in the field of medical dosimetry?

The unit commonly used for radiation dose measurement in medical dosimetry is the Gray. This unit quantifies the amount of radiation absorbed by an object, particularly human tissue, and is defined as the absorption of one joule of radiation energy by one kilogram of matter. Gray is essential in the context of radiation therapy because it provides a standardized way to discuss and calculate the dose of radiation delivered to patients, ensuring safety and effectiveness in treatment.

While there are other units of measurement for radiation, such as the Sievert, which accounts for biological effects of radiation exposure, and the Rad, which is an older unit equivalent to 0.01 Gray, the Gray is the more contemporary and widely adopted unit in the practice of medical dosimetry. Joules, while they measure energy, are not specifically tailored for assessing radiation doses, which is why Gray is the preferred choice in a medical context.