Which units measure dose equivalent?

Which units measure dose equivalent?

• A. Rad and Rem
• B. Rad and Sievert
• C. Rem and Sievert
• D. Rad, Rem, and Sievert

Answer: (C)

Dose equivalent expresses the biological impact of radiation, not just the energy deposited. It combines absorbed dose with a radiation weighting factor to reflect how different types of radiation affect tissue. The units used for dose equivalent are rem and sievert. The sievert is the SI unit, and 1 sievert equals 100 rem; conversely, 1 rem equals 0.01 sievert. Rad, on the other hand, is an older unit that measures absorbed dose (energy deposited per mass) rather than the adjusted biological effect, so it does not represent dose equivalent. That’s why the correct pairing is rem and sievert.

Dose equivalent expresses the biological impact of radiation, not just the energy deposited. It combines absorbed dose with a radiation weighting factor to reflect how different types of radiation affect tissue. The units used for dose equivalent are rem and sievert. The sievert is the SI unit, and 1 sievert equals 100 rem; conversely, 1 rem equals 0.01 sievert. Rad, on the other hand, is an older unit that measures absorbed dose (energy deposited per mass) rather than the adjusted biological effect, so it does not represent dose equivalent. That’s why the correct pairing is rem and sievert.