Table 2.

Depth Dose Profile Information for a 5 mm × 5 mm collimated beam.

Requested beam energy (MeV)	Distal 90%—proximal 90% width (mm)	Distal 90% depth (mm)	80%–20% fall-off distance (mm)	Entrance dose/peak dose ratio (%)
96	2.50	30.51	1.79	46.99
94	2.08	27.43	1.69	48.24
91	1.80	23.24	1.83	47.87
89	2.59	21.68	1.38	50.79
87	1.38	18.31	1.60	49.50
85	2.06	15.39	1.45	55.08
82	1.81	12.37	1.51	58.00
80	1.12	8.89	1.61	66.50
77	0.88	5.96	1.45	88.58