Table 1.

Fractions selected to obtain equivalent biologically effective dose (BED) levels to varying of the prescription dose and fractions.

Prescription Dose and Fractions (fx)	BED = 20 Gy	BED = 40 Gy	BED = 60 Gy	Total BED
35 Gy in 5 fx	Fraction 2 (BED = 23.8 Gy)	Fraction 3 (BED = 35.7 Gy)	Fraction 5 (BED = 59.5 Gy)	59.5 Gy
40 Gy in 5 fx	Fraction 1 (BED = 14.4 Gy)	Fraction 3 (BED = 43.2 Gy)	Fraction 4 (BED = 57.6 Gy)	72 Gy
50 Gy in 5 fx	Fraction 1 (BED = 20 Gy)	Fraction 2 (BED = 40 Gy)	Fraction 3 (BED = 60 Gy)	100 Gy
67.5 Gy in 15 fx	Fraction 3 (BED = 19.6 Gy)	Fraction 6 (BED = 39.2 Gy)	Fraction 9 (BED = 58.7 Gy)	97.9 Gy