Table 2.

Water‐equivalent depth of 50% maximum distal dose

Energy (MeV)	Modulation (mm)	Diode (mm)	Markus (mm)	Simulation (mm)	Diode – Markus (mm)	Diode – Geant4 (mm)
127	None	100.8	99.9	99.5	0.9	1.2
127	15	100.4	99.5	99.8	0.9	0.7
127	30	100.5	99.6	99.8	0.9	0.7
157	None	154.2	153.7	153.1	0.5	1.2
157	30	153.6	153.2	153.0	0.4	0.6
157	60	153.8	– a	153.0	– a	0.8

^aData unavailable.