Slide 1

BT-GYN Teaching Course

D. Berger

Limitations of the EQD2 model for BT

➢

Chemotherapy is not taken into account

➢

Uncertainty increases for single fraction dose values >7-10Gy

➢

Only cell repair is considered

➢

/

values and T

1/2

are under discussion

(E.g. tumour type prostate, OAR etc.)

➢

Repopulation not taken into account (while we know that overall

treatment time is important)