Reducing The Number Of Fractions Discussion Paper

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Total radiation dose planned – 45Gy in 25 fractions

dose given per fraction- 45/25=1.8 Gy

to keep the same effect on tumour, total dose will remail the same

Step 2/2

Now, total dose planned is 45 Gy, and number of fractions is 17

so, dose per fraction= 45/17=2.64 Gy/fraction

but, maximum dose of rdiotherapy to avoid serious complications like pneumonitis, max dose per fraction is 2Gy.

Final answer