Table 2.

Radiobiological parameters used in the LKB model for the calculation of NTCP.

Side effect	Urethra stricture	Rectum proctitis, necrosis stenosis and fistula	Bladder contracture and severe volume loss
m	0.23	0.15	0.11
D50 (Gy)	116.7	80	80
n	0.3	0.12	0.5
(Gy)	5	5.4	7.5

^{11 30 31}