Entry: Absorbed Dose

URI: http://registry.it.csiro.au/def/qudt/1.1/qudt-quantity/AbsorbedDose

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is a quantity kind | radiology quantity kind
submitted bySimon Cox

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date submitted 10 Aug 2015 10:20:32.054
entity Absorbed Dose
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item class quantity kind | radiology quantity kind
label Absorbed Dose
notation AbsorbedDose
register qudt quantity
status status experimental
account name simon.cox@csiro.au
name Simon Cox

type register item
version info 1

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description Absorbed dose (also known as Total Ionizing Dose, TID) is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit J/kg, which is given the special name Gray (Gy). Note that the absorbed dose is not a good indicator of the likely biological effect. 1 Gy of alpha radiation would be much more biologically damaging than 1 Gy of photon radiation for example. Appropriate weighting factors can be applied reflecting the different relative biological effects to find the equivalent dose. The risk of stoctic effects due to radiation exposure can be quantified using the effective dose, which is a weighted average of the equivalent dose to each organ depending upon its radiosensitivity. When ionising radiation is used to treat cancer, the doctor will usually prescribe the radiotherapy treatment in Gy. When risk from ionising radiation is being discussed, a related unit, the Sievert is used.
exact match absorbed dose | absorbed dose
generalization Specific Energy
label Absorbed Dose
type quantity kind | radiology quantity kind


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