Table 4.

Beam profile analysis for TrueBeam, Clinac, and Trilogy linear accelerators.

$\text{Energy}=6\hspace{0.17em}\text{MV}$		$10\hspace{0.17em}cm\times 10\hspace{0.17em}cm$ Field Size		$40\hspace{0.17em}cm\times 40\hspace{0.17em}mm$ Field Size
Depth (cm)	Linear Accelerator	Penumbra (mm)	Field Width (cm)	Penumbra (mm)	Field Width (cm)
	TrueBeam#1	5.7	10.17	6.0	40.77
	TrueBeam#2	5.6	10.18	5.9	40.78
1.5	TrueBeam#3	5.5	10.17	5.8	40.79
	Clinac 2100	5.4	10.15	5.7	40.72
	Trilogy	5.5	10.16	5.7	40.91
	TrueBeam#1	7.2	11.03	10.1	44.14
	TrueBeam#2	7.0	11.03	10.0	44.11
10	TrueBeam#3	7.0	11.05	9.9	44.19
	Clinac 2100	6.8	11.02	10.0	44.16
	Trilogy	6.8	11.03	10.1	44.29

$\text{Energy}=15\hspace{0.17em}\text{MV}$		$10\hspace{0.17em}cm\times 10\hspace{0.17em}cm$ Field Size		$40\hspace{0.17em}cm\times 40\hspace{0.17em}mm$ Field Size
Depth (cm)	Linear Accelerator	Penumbra (mm)	Field Width (cm)	Penumbra (mm)	Field Width (cm)
	TrueBeam#1	6.8	10.34	6.9	41.19
	TrueBeam#2	6.8	10.34	7.3	41.13
2.8	TrueBeam#3	6.7	10.33	7.0	41.14
	Clinac 2100	6.4	10.36	6.7	41.25
	Trilogy	6.4	10.32	6.9	41.26
	TrueBeam#1	7.8	11.06	8.9	44.08
	TrueBeam#2	7.7	11.05	9.2	44.07
10	TrueBeam#3	7.6	11.07	8.8	44.19
	Clinac 2100	7.5	11.08	8.6	44.26
	Trilogy	7.3	11.04	8.8	44.21