Radiobiology 2016

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Standard treatment is 35 × 2 Gy to 70 Gy. Initially the schedule is given in error as 4 Gy per fraction for the first 6 fractions i.e. the first 24 Gy is given “hypofractionated” Compensation: 70 − 24 = 46 70 × 2 − 24 × 4 70 − 24 = 0.9565... 46/0.9565… = 48 fractions; d = 0.958 Gy Example revisited:

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