Table 1.

Beam configurations for initial spot scanning plans.

Field	MU	Energy (MeV)	Range (cm)	SOBP (cm)	Gantry Angle	Couch Angle	Plan
RPO	34.4	144.9‐72.5	14.8	13.3	260	0	Plan 1
LAO	40.7	146.9‐76.1	14.7	12.78	50	0	Plan 1
LPO	25.2	138.1‐72.5	13.9	12.84	105	0	Plan 1
RPO	30.8	148.8‐74.3	15.8	12.34	255	0	Plan 2
RAO	24.3	139.8‐72.5	14.6	13.12	300	0	Plan 2
Vertex	41.5	178.6‐119.6	21.3	12.09	290	90	Plan 2

$\text{SOBP}=\text{spread}‐\text{out Bragg peak}$.