Table VI.

Maximum deviation between calculated and measured dose profiles for 60° wedged fields. Maximum difference at depth of 1.5 cm. Calculated value at other depths within 2.0% of measurement. Maximum difference at depth of 1.5 cm. Calculated value at other depths within 2.5% of measurement.

			Central axis		Off‐axis inside beam		Off‐axis outside beam
Field Size (cm)	$d_{max}$ (cm)	$(1.0\hspace{0.17em}\text{cm}-d_{max})$	$(d_{max}-19\hspace{0.17em}\text{cm})$	$(19-40\hspace{0.17em}\text{cm})$	$<35\hspace{0.17em}\text{cm}$	35 cm	$<35\hspace{0.17em}\text{cm}$	35 cm	Penumbra $(>20\%)$
$4\times 4$	1.70	3.7%	0.4%	0.6%	1.9%	1.8%	0.9%	0.7%	$<1\hspace{0.17em}\text{mm}$
$5\times 5$	1.70%	3.8%	0.5%	0.7%	2.9%a	2.3%	1.0%	1.6%	$<1\hspace{0.17em}\text{mm}$
$6\times 6$	1.75	4.1%	0.5%	0.8%	2.5%a	2.1%	1.3%	1.8%	$<1\hspace{0.17em}\text{mm}$
$8\times 8$	1.80	4.3%	0.3%	0.8%	3.2%b	2.4%	1.2%	1.7%	$<1\hspace{0.17em}\text{mm}$
$10\times 10$	1.70	4.1%	0.6%	1.0%	3.2%	1.7%	1.3%	2.0%	1 mm
$12\times 12$	1.70	5.0%	0.5%	0.9%	1.6%	1.8%	2.4%	2.5%	1 mm
$15\times 15$	1.60	2.3%	0.4%	1.0%	2.5%	1.5%	3.4%	3.0%	2 mm