Table 2.

Measurement subset (X) for off‐axis relative dose profile measurements using energies 6, 12, and 20 MeV at 100 cm and 110 cm SSD. This measurement subset was also used for PDD and output measurements at 110 cm SSD.

Field Size (cm2)	Applicator Size (cm2)
	$6\times 6$	$10\times 10$	$15\times 15$	$20\times 20$	$25\times 25$
$2\times 2$	X		X		X
$3\times 3$	X				X
$4\times 4$	X		X		X
$6\times 6$					X
$8\times 8$			X		X
$10\times 10$					X
$12\times 12$			X		X
$15\times 15$					X
$20\times 20$					X