Absorbed dose refers to ______.

Absorbed dose refers to ______.

• A. The transfer of radiation energy into tissue or other matter
• B. Occupational radiation exposure
• C. The amount of ionizing or electrical charge in air
• D. The real active risk the exposure has to humans

Answer: (A)

Absorbed dose is the energy deposited by ionizing radiation in a unit mass of tissue. It measures how much energy the tissue actually absorbs, not just how much radiation is present or how risky it might be. The unit is the gray (Gy), where 1 Gy equals 1 joule of energy absorbed per kilogram of tissue. This concept is different from exposure, which describes how much ionization is produced in air (historically measured in roentgens). It’s also different from dose equivalent or effective dose, which adjust the absorbed dose to account for the type of radiation and the sensitivity of tissues to estimate biological risk. So the statement that matches is the idea that absorbed dose reflects the transfer of radiation energy into tissue per unit mass.

Absorbed dose is the energy deposited by ionizing radiation in a unit mass of tissue. It measures how much energy the tissue actually absorbs, not just how much radiation is present or how risky it might be. The unit is the gray (Gy), where 1 Gy equals 1 joule of energy absorbed per kilogram of tissue.

This concept is different from exposure, which describes how much ionization is produced in air (historically measured in roentgens). It’s also different from dose equivalent or effective dose, which adjust the absorbed dose to account for the type of radiation and the sensitivity of tissues to estimate biological risk. So the statement that matches is the idea that absorbed dose reflects the transfer of radiation energy into tissue per unit mass.