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How does the uncertainty (

σ

) influence the

action limits?

Example with large uncertainty:

Dose (Gy)

TL

TL

Prescribed dose

Probability distribution

for the true dose

Action limits

go to zero

when

Clinical tolerance

limits

−∆

+∆

dose measurement

uncertainty

increases

From Jörgen Olofsson (Dose Modeling and dose verification ESTRO COURSE)