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Table 2 Treatment characteristics and dosimetric parameters

From: Treatment outcomes of passive scattering proton beam therapy for stage I non-small cell lung cancer

Characteristics

No

Range

Total dose/fractions, (BED10)a

60 CGE/4 fx (150)

11

 

50 CGE/4 fx (112.5)

22

 

70 CGE/10 fx (119)

6

 

60 CGE/10 fx (96)

3

 

PTV (cm3)

  

Median

34.55

9.6–84

Total lung, median (range)

V5 (%)

10.79

3.61–18.67

V10 (%)

8.71

2.84–16.24

V15 (%)

7.09

2.25–12.78

V20 (%)

5.85

1.74–10.86

V30 (%)

3.72

1.16–8.11

V40 (%)

2.26

0.76–5.68

Mean dose (CGE)

2.99

0.07–5.44

Heart, median (range)

V5 (%)

0

0–5.26

V10 (%)

0

0–4.03

V15 (%)

0

0–3.08

V20 (%)

0

0–1.99

V30 (%)

0

0–1.19

V40 (%)

0

0–0.48

Mean dose (CGE)

0.003

0.002–1.13

Max dose (CGE)

0.2

0.002–63.74

Esophagus, median (range)

Mean dose (CGE)

0.003

0.002–1.36

Max dose (CGE)

3.6

0 .08–17.55

Spinal cord, median (range)

Max dose (CGE)

0.006

0.002–14.1

Chest wall, median (range)

Max dose (CGE)

56.0

31.0–75.9

  1. (a) Biologically equivalent dose using α/β ratio of 10
  2. CGE, cobalt Gray equivalents; GTV, gross tumor volume; cm3, cubic centimeter; PTV, planning target volume