Physics Athens 2016

∙  k i

D w,Q

= M Q

∙N D,w,Co

∙k Q,Co

1. Determine (once) k Q,Co

, dependent on chamber type and Q

1. determine Q: TPR 20,10

(  effective attenuation coefficient)

2. determine k Q,Co

: look-up table TRS 398 for NE2571 and TPR 20,10

2. Establish (once) part of k i

in treatment beam (k rec

, k pol

)

3. Perform measurement in beam Q in reference conditions  M

Q

4. Correct with k p,T 5. D w,Q = M Q

∙  k i

∙N D,w,Co

∙k Q,Co