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20 Cards in this Set
- Front
- Back
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What two units represent the amount of activity?
Which one is the SI unit? |
Bq, Becquerel, SI unit
Ci, Curie |
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What does dps stand for?
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disintegrations per second
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How many dps are there in a Bq?
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1
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How many dps are there in 1 Ci?
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3.7 * 10^10 dps
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The Curie and Becquerel measure ____________.
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The amount of radiation.
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If someone wants to measure the exposure from radiation, they would use what 2 units? Which one is the SI unit?
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The Roentgen (R) and coulombs per kg (this is the SI unit)
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Measuring the number of ions per mass is a measure of ______________.
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Exposure
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Measuring how much energy was deposited per mass is a measure of _____________.
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Absorbed dose
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Measuring how much energy was deposited per mass with consideration for what type of radiation and what type of tissue is a measure of _____________.
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equivalent dose
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What are the units for absorbed dose? Which one is the SI unit?
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SI: Gy, the gray
rad, radiation absorbed dose |
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What is the unit for equivalent dose? Which one is the SI unit?
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SI: Sv, the Sievert
rem, Roentgen Equivalent Man |
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What measurement is used to describe the degree of biological effect produced by different types of radiation at the same absorbed dose.
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RBE, Relative Biological Effectiveness
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T/F. The RBE is usually calculated from some reference standard.
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True, it is usually gamma rays from Cobalt-60 (1.25 MeV)
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What does A tilde mean and what are its units?
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It is the cumulated activity in the region of ineterst. Its unit is microCurie hr.
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What is S in the MIRD equation and what are its unit?
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S is the mean dose/unit cumulated activity. Its unit is (rad/microCi hr)
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What is D in the MIRD equation and what is its unit?
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Absorbed dose. Its unit is the rad.
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What do the 't' and 's' subscripts mean on the 'r'?
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target organ, source organ respectively.
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What does H-sub-T, D and W-sub-R stand for?
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H-sub-T is the symbol for the equivalent dose.
D is the absorbed dose in rad. W-sub-R is the radiation weighting factor. |
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What does E and W-sub-T stand for?
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E is the symbol for Effective dose.
W-sub-T is the tissue weighting factor. |
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When you want to measure the intensity of the radiation at its source you would use which two units?
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Becquerel and Curie
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