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Table 1 Dose variations due to depth doses and profiles for 21EX radiation beams

From: Method for validating radiobiological samples using a linear accelerator

  Depth of Max Dose (dmax) Depth dose variation (dmax + 1.5 cm) Profile variation (±4 cm from center axis ) Total variation
6 MV 1.4 cm 4.9% 2% 6.9%
18 MV 2.7 cm 3.3% 3% 6.6%
6 MeV 1.5 cm 86.5% 1% 87.5%
9 MeV 2.2 cm 49.3% 2% 51.3%
12 MeV 2.9 cm 19.7% 0.5% 20.2%
16 MeV 2.0 cm 2.5% 1% 3.5%
20 MeV 2.1 cm 0.4% 2% 2.4%
  1. Total variation is the smallest for 20 MeV electron beam.