Advanced Physics for Brachytherapy 2018

Beam quality:Q 0 (Co-60 or MV linac photon beam)

Calibration: !!! Calibration uncertainty will be propagated as a type B unc. component to experimental results !!!

Absorbed dose sensitivity calibration

) 0( QM

1

dosimeter

( , Q

)0 =

=

S w AD

D

)0 QwADN Q ( ,

)0(

w

is usually performed using a Linac where: M(Q 0 ) is the dosimeter reading

D

(Q 0 ) is dose to water at the point of measurement in the absence of the detector obtained using an established reference dosimetry protocol (e.g. TRS398) and an ion chamber with a dose to water calibration traceable to international standards

w