Dose Course 2018_Flipping book

Example: Determine the uncertainty of a dose determination under reference conditions

Model equation to determine water absorbed dose:

D

(

M

*

M 0

)

N

k   

k

k

k

=

−





w

s

p

Q



M* Reading of the dosimeter M 0

Reading due to leakage current,

N

Calibration factor in terms of absorbed dose to water

k

air density correction factor



k s Factor to correct the response of an ionization chamber for the lack of complete charge collection (due to ion recombination). k p Factor to correct the response of an ionization chamber for the effect of a change in polarity of the polarizing voltage applied to the chamber. k Q beam quality correction factor

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