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2 '
2 '
2
'
'
CF
Fcal
t
measuremen
total
u
u
u
u
“The overall accuracy of entrance in vivo measurements is determined by
the combined uncertainty in the calibration factor, the correction factors
and the accuracy and reproducibility in diode position
”
In our case it is equal to
2% (1sd
).
So without any additional cause of
error 68% of all measurements would have a dispersion of
±
2% and 95%
of
±
4%.”
Essers and Mijnheer, Int.J.Radiat.Oncol.Biol.Phys., 1999
Tolerance limits and action levels