Table 3.

Normal tissue complication probability parameters

		$\frac{\alpha }{\beta }$(Gy)	$T{D}_{50}$(Gy)	$m$	$n$	Source
Bladder	Contracture/volume loss	3	80	0.11	0.5	Burman, et al.51
Rectum	Grade 2 + late toxicity or rectal bleeding	3	76.9	0.13	0.09	Michalski, et al.52
Urethra	Stricture requiring urethrotomy within 4 years after RT completion	5	70.7	0.37	0.3	Panettieri et al.53
Femoral Heads	Necrosis	3	65	0.12	0.25	Burman, et al.51