TABLE 3.

Comparison of the noMag and wMag methods for small fields

Small field comparison
Location	noMag method	wMag method
d = 10 cm, CAX	0.9%	0.5%
d = 20 cm, +0.5 cm X‐OAX	2.2%	1.6%
d = 20 cm, ‐0.5 cm X‐OAX	0.3%	0.8%
d = 5 cm, +0.5 cm Y‐OAX	1.4%	1.1%
d = 5 cm, ‐0.5 cm Y‐OAX	0.7%	0.4%

Note: All points are within 2% which is within MPPG5a tolerances except for single OAX noMag comparison.

Abbreviations: MPPG5a, Medical Physics Practice Guideline 5.a; OAX, off‐axis.