Table 3.

Predicted ERR values of second cancer incidence in the bladder, bladder wall, rectum, and rectal wall predicted with the LNT risk model from therapeutic radiation from IMRT (Fontenot et al 2009), VMAT (this work), lateral-opposed beam proton therapy (Proton (lat-opposed)) (Fontenot et al 2009), and uniformly weighted proton arc therapy (PAT (uniform)) (this work).

Organ	ERR
	IMRT	VMAT	Proton (lat-opposed)	PAT (uniform)
Bladder	8.88	5.25	3.68	4.86
Bladder Wall	10.44	6.55	5.26	6.24
Rectum	3.32	2.09	2.01	2.74
Rectal Wall	3.43	2.43	2.19	2.97