Table 1.

Parameters used in the TCP calculation².

Structure	a	${\gamma }_{50}$ (cGy)	$\alpha /\beta$	$T{D}_{50}$ (cGy)	$\mathit{TC}{D}_{50}$ (cGy)
PTV	−13	2,28	10	5177	7412
Brainstem	7	3	2.1	6500	7412
Spinal Cord	13	4	2	6650	7412
Parotid grand	0.5	3	2	4600	7412