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Table 2 Results of the TLD measurements and TPS calculations at the four positions in 3 mm depth (3.1 – 3.4) and 1 mm depth (O.1 – O.4) in Gy for the 4 MV and the 6 MV (without flab) treatment plan

From: Measurement of skin and target dose in post-mastectomy radiotherapy using 4 and 6 MV photon beams

Position 4MV 6MV
  Measured dose ± error/Gy Computed dose/Gy Difference/% Measured dose ± error/Gy Computed dose/Gy Difference/%
O.1 1.39 ± 0.03 1.41 1.4 1.23 ± 0.01 1.23 0.0
O.2 1.41 ± 0.03 1.38 -2.1 1.16 ± 0.01 1.25 7.8
O.3 1.46 ± 0.03 1.42 -2.7 1.35 ± 0.01 1.35 0.0
O.4 1.57 ± 0.02 1.55 -1.3 1.30 ± 0.02 1.37 5.4
3.1 1.90 ± 0.04 1.87 -1.6 1.73 ± 0.01 1.64 -5.2
3.2 1.89 ± 0.03 1.88 -0.5 1.78 ± 0.02 1.71 -3.9
3.3 1.86 ± 0.05 1.88 1.1 1.81 ± 0.02 1.74 -3.9
3.4 1.90 ± 0.06 1.95 2.6 1.74 ± 0.02 1.83 5.2
  1. The 6 MV treatment without/with bolus was weighted 40/60. The last column indicates the difference between calculation and measurement.