Which statement about effective dose is true?

Which statement about effective dose is true?

• A. It uses no weighting factors
• B. It combines absorbed dose with tissue weighting factors
• C. It is measured in gray
• D. It ignores radiation type

Answer: (B)

Effective dose represents overall risk from exposure by combining how much energy is deposited in each tissue with how sensitive that tissue is to radiation. Absorbed dose tells you energy per mass deposited, but tissues differ in how harmful that energy is, and different radiation types cause different biological effects. To capture this, the concept uses weighting factors: first, a radiation-type weighting factor adjusts the absorbed dose to an equivalent dose for each tissue, and then a tissue weighting factor reflects each tissue’s sensitivity and risk, summing across all tissues to produce a single dose value. The result is expressed in sieverts. That’s why the statement is true: it emphasizes combining absorbed dose with tissue weighting factors to reflect varying tissue radiosensitivity in a single, risk-oriented quantity. Remember that absorbed dose is measured in gray, whereas effective dose is in sieverts, and the full calculation also accounts for radiation type via the equivalent-dose step.

Effective dose represents overall risk from exposure by combining how much energy is deposited in each tissue with how sensitive that tissue is to radiation. Absorbed dose tells you energy per mass deposited, but tissues differ in how harmful that energy is, and different radiation types cause different biological effects. To capture this, the concept uses weighting factors: first, a radiation-type weighting factor adjusts the absorbed dose to an equivalent dose for each tissue, and then a tissue weighting factor reflects each tissue’s sensitivity and risk, summing across all tissues to produce a single dose value. The result is expressed in sieverts.

That’s why the statement is true: it emphasizes combining absorbed dose with tissue weighting factors to reflect varying tissue radiosensitivity in a single, risk-oriented quantity. Remember that absorbed dose is measured in gray, whereas effective dose is in sieverts, and the full calculation also accounts for radiation type via the equivalent-dose step.