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Table 2 Dose parameters for neoadjuvant treatment

From: DVH- and NTCP-based dosimetric comparison of different longitudinal margins for VMAT-IMRT of esophageal cancer

Neoadjuvant treatment (41.4 Gy)

 

PTV2

PTV3

PTV4

  
 

Mean ± SD

Mean ± SD

Mean ± SD

p-Valuea

p-Valueb

Myelon

 Dmax (Gy)

31.65 ± 4.29

31.99 ± 4.02

32.68 ± 4.13

0.036

0.173

Liver

 Dmean (Gy)

0.50 ± 1.01

0.71 ± 1.33

0.95 ± 1.54

0.020

0.033

 Dmedian (Gy)

0.18 ± 0.20

0.29 ± 0.39

0.49 ± 0.85

0.203

0.179

Heart

 Dmin (Gy)

0.91 ± 2.27

0.97 ± 2.20

1.03 ± 1.96

0.591

0.393

 Dmax (Gy)

25.95 ± 19.04

35.54 ± 13.99

41.25 ± 5.98

0.118

0.021

 Dmean (Gy)

6.48 ± 5.91

7.83 ± 6.27

8.83 ± 6.13

0.036

0.009

 Dmedian (Gy)

4.95 ± 5.19

6.11 ± 5.85

6.47 ± 5.86

0.256

0.059

 V5 (%)

35.81 ± 37.94

45.22 ± 38.64

53.14 ± 39.64

0.002

0.001

 V10 (%)

26.15 ± 29.53

33.25 ± 31.89

37.34 ± 30.39

0.174

0.016

 V15 (%)

13.94 ± 15.65

17.77 ± 17.00

19.59 ± 15.83

0.270

0.023

 V20 (%)

7.97 ± 9.09

10.21 ± 9.85

11.20 ± 9.16

0.295

0.027

 V25 (%)

5.05 ± 5.85

6.48 ± 6.30

7.18 ± 5.99

0.238

0.026

 V30 (%)

3.47 ± 4.08

4.43 ± 4.37

5.03 ± 4.30

0.135

0.021

 V35 (%)

2.50 ± 3.01

3.16 ± 3.23

3.69 ± 3.29

0.068

0.018

Lungs

 Dmin (Gy)

0.19 ± 0.12

0.24 ± 0.16

0.32 ± 0.22

0.007

0.003

 Dmax (Gy)

42.45 ± 0.19

42.48 ± 0.28

42.62 ± 0.52

0.357

0.340

 Dmean (Gy)

9.28 ± 1.85

10.33 ± 1.83

11.02 ± 1.86

<0.001

<0.001

 Dmedian (Gy)

6.89 ± 3.92

8.51 ± 3.41

9.60 ± 2.46

0.011

0.001

 V5 (%)

61.73 ± 17.57

69.24 ± 17.61

74.24 ± 18.25

<0.001

<0.001

 V10 (%)

42.74 ± 9.29

48.43 ± 9.67

52.59 ± 10.47

0.003

<0.001

 V15 (%)

20.84 ± 6.11

23.55 ± 6.37

25.42 ± 5.72

0.004

<0.001

 V20 (%)

9.50 ± 3.51

10.70 ± 3.67

11.41 ± 3.45

0.011

<0.001

 V25 (%)

4.68 ± 1.64

5.31 ± 1.70

5.64 ± 1.60

0.017

<0.001

 V30 (%)

2.69 ± 0.75

3.05 ± 0.76

3.25 ± 0.72

0.012

<0.001

 V35 (%)

1.74 ± 0.40

1.95 ± 0.39

2.08 ± 0.40

0.017

<0.001

  1. a4 cm margin vs. 3 cm margin, b 4 cm margin vs. 2 cm margin, Gy Gray, cm centimeters