Question:medium
Which of the following best estimates the amount of radiation delivered to an organ in the radiation field?
Which of the following best estimates the amount of radiation delivered to an organ in the radiation field?
Show Hint
Energy deposited per kilogram of that tissue, measured in gray.
Updated On: Jun 24, 2026
- Absorbed dose
- Equivalent dose
- Effective dose
- Exposure dose
Show Solution
The Correct Option is A
Solution and Explanation
Read the aim carefully. We want the quantity that says how much radiation a given organ truly took up while it sat in the beam.
The cleanest match is absorbed dose. It is defined as energy deposited per kilogram of that tissue, with the unit gray. Since it is tied directly to the energy left behind in the organ, it answers the question of how much radiation was delivered there.
Sort out the rest. Equivalent dose scales absorbed dose by a factor for the kind of radiation, giving sieverts, so it is about biological damage potential, not raw delivery. Effective dose goes further, weighting each organ and adding them up to gauge whole body cancer risk, so it is not organ specific delivery. Exposure dose only measures ionisation produced in air, which is upstream of what the tissue absorbs.
So when the target is energy delivered to one organ in the field, absorbed dose is the right measure.
\[\boxed{\text{Absorbed dose}}\]
The cleanest match is absorbed dose. It is defined as energy deposited per kilogram of that tissue, with the unit gray. Since it is tied directly to the energy left behind in the organ, it answers the question of how much radiation was delivered there.
Sort out the rest. Equivalent dose scales absorbed dose by a factor for the kind of radiation, giving sieverts, so it is about biological damage potential, not raw delivery. Effective dose goes further, weighting each organ and adding them up to gauge whole body cancer risk, so it is not organ specific delivery. Exposure dose only measures ionisation produced in air, which is upstream of what the tissue absorbs.
So when the target is energy delivered to one organ in the field, absorbed dose is the right measure.
\[\boxed{\text{Absorbed dose}}\]
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