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Table 2 Comparison of dosimetric parameters between autoVMAT and manVMAT plans. Population mean values for the 20 study patients and corresponding standard deviations are reported

From: Automated VMAT planning for postoperative adjuvant treatment of advanced gastric cancer

Structure

Parameter

autoVMAT

manVMAT – autoVMAT

Mean ± SD

Mean diff. ± SD

p-value

PTV

V95% (%)

97.4 ± 1.0

- 0.8 ± 1.7

0.085

D98% (Gy)

42.5 ± 0.5

- 0.2 ± 0.7

0.14

D2% (Gy)

46.3 ± 0.1

0.5 ± 0.2

<  0.001

HI

0.09 ± 0.01

0.02 ± 0.02

0.003

CI

0.91 ± 0.02

- 0.04 ± 0.03

<  0.001

Left Kidney

Dmean (Gy)

12.7 ± 4.3

1.8 ± 1.6

0.001

D30% (Gy)

14.9 ± 8.1

2.1 ± 3.3

0.013

D50% (Gy)

8.9 ± 3.5

2.4 ± 2.2

0.002

D60% (Gy)

7.3 ± 1.9

2.4 ± 1.4

<  0.001

V12Gy (%)

32.2 ± 14.0

11.7 ± 7.7

<  0.001

V20Gy (%)

19.2 ± 13.2

1.0 ± 3.9

0.117

NTCP (%)

45.1 ± 35.8

11.3 ± 10.9

0.001

Right Kidney

Dmean (Gy)

7.5 ± 1.7

3.0 ± 1.2

<  0.001

D30% (Gy)

7.8 ± 1.7

4.1 ± 1.6

<  0.001

D50% (Gy)

6.1 ± 1.3

3.1 ± 1.3

<  0.001

D60% (Gy)

5.5 ± 1.2

2.7 ± 1.1

<  0.001

V12Gy (%)

12.4 ± 4.8

18.9 ± 8.4

<  0.001

V20Gy (%)

3.8 ± 2.8

3.0 ± 2.8

0.001

NTCP (%)

4.2 ± 3.8

12.8 ± 7.2

<  0.001

Liver - PTV

Dmean (Gy)

18.6 ± 3.3

1.8 ± 2.8

0.02

D30% (Gy)

21.9 ± 4.1

2.8 ± 3.2

0.003

D50% (Gy)

17.1 ± 3.6

1.7 ± 3.3

0.048

D60% (Gy)

15.1 ± 3.4

1.2 ± 3.3

0.14

V24Gy (%)

25.4 ± 11.6

7.1 ± 8.8

0.004

V30Gy (%)

12.9 ± 6.0

4.7 ± 4.6

0.001

NTCP (%)

31.1 ± 23.2

7.0 ± 7.0

0.001

Heart

Dmean (Gy)

12.7 ± 4.7

0.7 ± 1.8

0.117

Dmax (Gy)

46.8 ± 0.6

0.8 ± 1.2

0.009

Spinal cord

Dmean (Gy)

13.9 ± 2.6

2.9 ± 1.5

<  0.001

Dmax (Gy)

31.6 ± 2.6

6.7 ± 3.2

<  0.001

Left Lung

Dmean (Gy)

7.3 ± 3.2

0.6 ± 0.3

<  0.001

V5Gy (%)

32.7 ± 15.6

1.4 ± 1.0

<  0.001

V20Gy (%)

14.0 ± 7.2

2.2 ± 1.8

<  0.001

Right Lung

Dmean (Gy)

5.4 ± 3.3

0.3 ± 0.5

0.013

V5Gy (%)

31.2 ± 16.8

1.1 ± 2.1

0.01

V20Gy (%)

7.0 ± 7.6

0.8 ± 1.8

0.078

Patient

Dmean (Gy)

9.4 ± 1.9

0.5 ± 0.3

<  0.001

V5Gy (%)

40.2 ± 8.9

1.6 ± 0.8

<  0.001

V11.25Gy (%)

30.0 ± 6.6

1.8 ± 1.7

0.001

V22.5Gy (%)

16.2 ± 3.3

1.5 ± 1.1

<  0.001

  1. Abbreviations: HI homogeneity index, CI conformity index, NTCP normal tissue complication probability