One of the most widely used treatment schedules for radiotherapyis the administration of daily fractions on weekdays (Mondaythrough Friday) for four consecutive weeks. The most widely useddose per fraction is 2 Gy. Assuming that NSD is 17 and that theexponents given in the text for the Strandqvist and Ellis NSDequations are appropriate, what change in the daily dose perfraction would be required if the total dose in the standardfour-week schedule is 60 Gy and this dose must be given in threeweeks instead of four weeks

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