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Table 1 Definition of the scores

From: Efficacy of virtual block objects in reducing the lung dose in helical tomotherapy planning for cervical oesophageal cancer: a planning study

 

clear the criteria

reduce the criteria 20%

reduce the criteria 30%

reduce the criteria 40%

reduce the criteria 50%

Score

1

2

3

4

5

V5 (%)

44< LV ≦55

38.5< LV ≦44

33< LV ≦38.5

27.5< LV ≦33

LV ≦27.5

V10 (%)

29.6< LV ≦37

25.9< LV ≦29.6

22.2< LV ≦25.9

18.5< LV ≦22.2

LV ≦18.5

V20 (%)

20< LV ≦25

17.5< LV ≦20

15< LV ≦17.5

12.5< LV ≦15

LV ≦12.5

VS5 (mL)

1800> LV ≧1500

1950> LV ≧1800

2100> LV ≧1950

2250> LV ≧2100

LV ≧2250

  1. V5 lung volume receiving 5 Gy, V10 lung volume receiving 10 Gy,V20 lung volume receiving 20 Gy, VS5 normal pulmonary volume of less than 5 Gy, LV average lung volume