Modern Bt Techniques - Florence 2016

Biologically equivalent dosis

of 30 Gy / 10 fractions

Reference: 2 Gy / fraction

• EQD2 = 30 (

α/β

+ 3) / (

α/β

+ 2)

• Tumour (Squamous cell ca – early responding

normal tissues):

α/β

= 10 Gy EQD2 = 30 x 13 / 12 =

32.5 Gy

• Late responding normal tissues:

α/β

= 3 Gy EQD2

= 30 x 6 / 5 = 36 Gy