Advanced Physics for Brachytherapy 2018

Dose range / linearity / saturation:

D

)) ( D Mlk D  (

) ( DM

(

)

=

det

where: k l is the intrinsic linearity (normalized to 1 @ some D 0 ) and α relates D 0 to M(D 0 ) Detector response is linear if k l is 1 for any D, M(D)

•

!!!This is not always the case!!!

•

Figure from: Rogers & Cygler (Eds), Clinical dosimetry measurements in radiotherapy (2009 AAPM Summer School), Monograph No. 34, Medical Physics Publishing 2011