Table 3:

Comparison of (a) ARC, and (b) our model multi-IMPT for the brain case.

Structure	Quantity	Upper bound on BED (Gy)	ARC	multi-IMPT
CTV	CI	-	0.904	0.863
	${\text{D}}_{\text{max}}$	-	103.14%	104.08%
Brainstem	${\text{BED}}_{\text{max}}$ (Gy)	83.7	85.25	87.91
	${\text{BED}}_{\text{mean}}$ (Gy)	-	14.95	16.88
Brain	${\text{BED}}_{\text{max}}$ (Gy)	96	104.31	109.37
	${\text{BED}}_{\text{mean}}$ (Gy)	-	1.01	1.11