Table 3.

Width between 50% dose levels at ${\mathrm{d}}_{\text{max}}$ for the 6‐MV photon beam

Field width at $\text{SSD}=100$ cm	Width between 50% dose levels defined by jaws and MLC at $d_{\text{max}}$	Width between 50% dose levels defined by jaws only at $d_{\text{max}}$	Width between 50% dose levels defined by MLC only at $d_{\text{max}}$
40 mm	40.8 mm	40.7 mm	42.7 mm
100 mm	101.3 mm	101.3 mm	103.1 mm
200 mm	203.6 mm	203.7 mm	204.9 mm
300 mm	305.0 mm	305.1 mm	306.0 mm