Diapositive 1

Dose uncertainties in MC MV photon dose calculations

❑

Bazalova PMB 2008,

Dual-energy CT-based material extraction for tissue segmentation in Monte

Carlo dose calculations

250 kV x-rays

18 MV x-rays

real

segmented

17% errors

3% errors

From F Verhaegen

But <1% when dual energy used

Single energy CT

segmentation