Table 3.

Energy match analysis between TrueBeam, Clinac, and Trilogy linear accelerators.

Energy (MV)	Data	Field Size $(cm\hspace{0.17em}\times \hspace{0.17em}cm)$	TrueBeam	Clinac	Trilogy
		$4\times 4$	1.37	1.38	1.41
	${\mathrm{d}}_{max}$ (cm)	$10\times 10$	1.41	1.41	1.44
		$40\times 40$	1.32	1.20	1.29
		$4\times 4$	61.4	61.4	61.7
6	${\text{PDD}}_{10}$ (%)	$10\times 10$	66.1	66.2	66.1
		$40\times 40$	71.8	71.3	71.5
		$4\times 4$	0.625	0.627	0.626
	${\text{TPR}}_{20/10}$	$10\times 10$	0.666	0.667	0.668
		$40\times 40$	0.745	0.741	0.746
		$4\times 4$	2.83	3.00	2.80
	${\mathrm{d}}_{max}$ (cm)	$10\times 10$	2.78	2.60	2.59
		$40\times 40$	2.02	2.15	2.08
		$4\times 4$	74.9	75.1	74.8
15	${\text{PDD}}_{10}$ (%)	$10\times 10$	76.7	76.6	76.5
		$40\times 40$	76.9	77.3	77.5
		$4\times 4$	0.731	0.731	0.733
	${\text{TPR}}_{20/10}$	$10\times 10$	0.763	0.762	0.763
		$40\times 40$	0.810	0.807	0.811