What is the absorbed dose unit used in radiologic practice?

What is the absorbed dose unit used in radiologic practice?

• A. Sievert
• B. Gray
• C. Rem
• D. R

Answer: (B)

Absorbed dose is the amount of radiation energy deposited in tissue per unit mass. The unit used for this in radiologic practice is the Gray, defined as 1 joule of energy absorbed per kilogram of tissue. This directly reflects the physical energy imparted to tissue. Other units exist for related concepts: Sievert is used for dose equivalent or effective dose, considering radiation type and tissue sensitivity; the rem is an older unit of dose equivalent; and the roentgen measures exposure in air, not the energy actually deposited in tissue.

Absorbed dose is the amount of radiation energy deposited in tissue per unit mass. The unit used for this in radiologic practice is the Gray, defined as 1 joule of energy absorbed per kilogram of tissue. This directly reflects the physical energy imparted to tissue. Other units exist for related concepts: Sievert is used for dose equivalent or effective dose, considering radiation type and tissue sensitivity; the rem is an older unit of dose equivalent; and the roentgen measures exposure in air, not the energy actually deposited in tissue.