arrt review: safety (radiation measurements) Flashcards
what measurements evaluate the intensity of x-ray radiation in the air?
air KERMA, exposure
what measurements evaluate the intensity of x-ray radiation in tissue?
absorbed dose, effective dose, equivalent dose
assuming no other changes, a decrease in kVp will result in a/an (increase/decrease) in absorbed dose
increase
_____________ is the only radiation measurement used to quantify the risk of long term effects such as cancer
effective dose
what does LET stand for?
linear energy transfer
what does RBE stand for?
relative biological effectiveness
what does Wr stand for?
radiation weighting factor
what does Wt stand for?
what does EqD stand for?
equivalent dose
what does EfD stand for?
DAP measures what?
the total radiation exposure by considering both the dose and the area of the x-ray beam
1 rem = ___ mSv
10 mSv
Memory trick for remembering measurement information
The A’s have Grays (Gy)
The E’s Have V’s ( Sievert Sv)
If there is a Q it multiplies 2 (Equivalent dose)
what does DDE stand for?
deep dose equivalent
what is deep dose equivalent?
external whole body exposure equivalent at a tissue depth of 1 cm
what does SDE stand for?
shallow dose equivalent
what is shallow dose equivalent?
external exposure of the skin or extremity taken as the dose equivalent at a tissue depth of 0.007cm, averaged over an area of 1 square cm
what does EDE stand for?
eye dose equivalent
what is eye dose equivalent?
external exposure of the lens of the dose taken as the dose equivalent at tissue depth of 0.3 cm
what does CDE stand for?
committed dose equivalent
what does committed dose equivalent measure?
dose equivalent to organs/tissue of reference that will be received from an intake of radioactive materials by an individual during the 50 year period following intake
what does CEDE stand for?
committed effective dose equivalent
what does TEDE stand for?
total effective dose equivalent
what does committed effective dose equivalent measure?
sum of the products of the weighting factors applicable to each of the body organs or tissues that are irradiated and the committed dose equivalents to these organs or tissues
what does TEDE measure?
sum of the deep dose equivalent (for external exposures) and the committed dose equivalent (for internal exposures)
absorbed dose*
SI unit = ___
conventional = ___
SI unit = Gy
conventional =
dose equivalent*
SI unit = ___
conventional = ___
SI unit = Sv
conventional =
exposure*
SI unit = ___
conventional = ___
SI unit = C/kg
conventional =
effective dose*
SI unit = ___
conventional = ___
SI unit = Sv
conventional =
air KERMA*
SI unit = ___
conventional = ___
SI unit = Gy
conventional =
