. Author manuscript; available in PMC: 2017 Mar 15.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2015 Dec 11;94(4):755–765. doi: 10.1016/j.ijrobp.2015.12.003

Table 1.

Dose fractionation schedules, biologically effective dose, and dose-volume constraints

Dose and no. of fractions	Biologically effective dose (Gy)	No. of patients	Average stomach V50 (cm³) or maximum point dose if V50 = 0 cm³	Average duodenum V50 (cm³) or maximum point dose if V50 = 0 cm³
63 Gy in 28 fx	77.2	14	25.5	22.8
70 Gy in 28 fx	87.5	11	25	27.6
67.5 Gy in 15 fx	97.9	7	0; 44.8 Gy	0; 44.9 Gy
60 Gy in 10 fx	96.0	1	0; 41.3 Gy	0; 43 Gy
50 Gy in 5 fx	100.0	1	0; 26.3 Gy	0; 36.1
51.3–70.4 Gy in 13–39 fx	70.4–84.3	13	33.9	15.2

Abbreviations: fx = fractions; V50 = volume of organ receiving >50 Gy.

α/β = 10 for calculation of biologically effective dose.