Table 4 Dose statistics for the PTV and OARs, and treatment planning parameters for plans

PTV

Mean (cGy)

3753.2 ± 44.8

3721.5 ± 60.2

3718.6 ± 38.8

3738.5 ± 32.9

3741.4 ± 55.7

3735.5 ± 31.4

D95 % (cGy)

3600

3600

3600

3600

3600

3600

D2 % (cGy)

3908.6.2 ± 41.2

3936.4 ± 35.2

3937.1 ± 39.8

3928.1 ± 47.3

3941.1 ± 51.7

3951.1 ± 56.6

D98 % (cGy)

3520.3 ± 22.5

3528.4 ± 28.9

3538.3 ± 26.4

3529 ± 21.7

3518.2 ± 25.7

3532 ± 20.2

V107 %

8.9 ± 2.5 %

9.1 ± 3.2 %

9 ± 3.5 %

9.2 ± 3.4 %

9.1 ± 2.8 %

9.3 ± 3.7 %

Lenses

Mean (Gy)

6.93 ± 0.41

6.88 ± 0.45

7.08 ± 0.55

6.95 ± 0.57

6.96 ± 0.82

7.11 ± 0.63

Optic nerves

Mean (Gy)

21.2 ± 2.76

21.4 ± 2.26

21.2 ± 2.55

22.1 ± 2.89

21.3 ± 2.68

21.9 ± 3.11

Parotids

Mean (Gy)

12.66 ± 1.82

13.15 ± 1.97

12.16 ± 1.88

13.06 ± 1.9

13.4 ± 1.72

13.27 ± 1.43

Thyroid

Mean (Gy)

12.88 ± 2.19

12.91 ± 2.37

12.42 ± 2.84

12.28 ± 2.41

13.44 ± 2.77

13.05 ± 2.76

Lungs

V5 %

42.1 ± 7.66 %

42.8 ± 7.52 %

43.6 ± 8.58 %

44.2 ± 8.64 %

45.1 ± 8.09 %

44.7 ± 8.60 %

Mean (Gy)

6.24 ± 0.52

6.46 ± 0.78

6.41 ± 0.83

6.38 ± 0.77

6.33 ± 0.29

6.51 ± 0.44

Esophagus

Mean (Gy)

15.1 ± 2.9

15.7 ± 2.2

15.5 ± 2.36

14.8 ± 2

15.3 ± 2.86

15.8 ± 2.11

Heart

Mean (Gy)

6.3 ± 1.58

6.1 ± 2.05

6.1 ± 2.95

6.5 ± 2.5

6.4 ± 2.8

6.2 ± 2.34

Liver

Mean (Gy)

5.31 ± 0.52

5.22 ± 0.88

5.45 ± 0.85

5.36 ± 0.49

5.1 ± 0.73

5.62 ± 0.76

Kidneys

Mean (Gy)

4.85 ± 0.65

4.92 ± 0.74

4.9 ± 0.53

5.02 ± 0.81

4.92 ± 0.69

5.23 ± 0.8

Planning parameters

Number of arc beams

4

4

4

7

7

7

Segments

236.9 ± 8.2

239.3 ± 6.4

241.7 ± 6.3

278.7 ± 5.3

277.4 ± 7.6

285.3 ± 8.8

Mus

1033.6 ± 55.3

1064.1 ± 39.8

1028.5 ± 61.4

1316.3 ± 78.1

1335.4 ± 56.7

1393.8 ± 51.4

Delivery time (s)^*

233.9 ± 16.4

236.3 ± 13.5

239.2 ± 15.7

310.7 ± 25.6

313.2 ± 18.1

323.9 ± 15.8

HI

10.96 ± 1.6 %

10.99 ± 1.4 %

11.05 ± 1.7 %

11.25 ± 1.6 %

11.2 ± 2.9 %

11.58 ± 1.9 %

CI (whole PTV)

90.6 ± 2 %

90.5 ± 2.4 %

90.1 ± 2.4 %

89.1 ± 3.1 %

88.6 ± 2.9 %

87.5 ± 1.9 %

CI (Spine only)

69.2 ± 3 %

68.5 ± 3.3 %

68.6 ± 3 %

67.2 ± 2.1 %

65.8 ± 2.4 %

66.1 ± 2.3 %