439 / 1173
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: