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Table 3 Number of Fractions and Doses

From: Re-irradiation in lung disease by SBRT: a retrospective, single institutional study

Number of fractions of the first treatment (SBRT)

Number

Percent

Single Fraction

30 Gy/ 1 fr

11

42

23 Gy/1 fr

3

11

Multiple Fractions

45 Gy/ 3fr

3

11

50 Gy/5 fr

3

11

60 Gy/ 30 fr a

5

18

30 Gy/ 10 fr b

2

7

Number of fractions of the re-irradiation (SBRT)

Single Fraction

30 Gy/ 1 fr

4

15

23 Gy/1 fr

3

11

Multiple Fractions

  

54 Gy/ 3 fr

3

11

45 Gy / 3fr

5

18

50 Gy/ 5fr

8

30

30Gy/fr 5

4

15

Medium biological effective dose (10Gy) (BED10)

Dose

Range

I Treatment

97,2 Gy

40–120

Re-Irradiation

100,6 Gy

48–151,2

Medium equivalent dose in 2 Gy (10 Gy) (EQD2)

DOSES

RANGE

I treatment

81 Gy

32,5–100 Gy

Re-Irradiation

93,8 Gy

40–126 Gy

Cumulative medium BED (10)

197,8 Gy

88–271,2 Gy

Cumulative medium EQD2 (10)

164,8 Gy

72,5–226 Gy

Median biological effective dose (10Gy) (BED10)

Doses

Range

I Treatment

112,5 Gy

40–120 Gy

Re-Irradiation

100 Gy

48–151,2 Gy

Median equivalent dose in 2 Gy (10 Gy) (EQD2)

Doses

Range

I treatment

93,8 Gy

32,5–100 Gy

Re-Irradiation

83,3 Gy

40–126 Gy

Cumulative median bed (10)

200 Gy

88–271,2 Gy

Cumulative median EQD2 (10)

166,7 Gy

72,5.226 Gy

  1. aTreatment done by IMRT technique
  2. b Treatment done by 3D technique