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Table 2 Mean GTV and the 5 ITVs defined for all tumors

From: Reconstitution of internal target volumes by combining four-dimensional computed tomography and a modified slow computed tomography scan in stereotactic body radiotherapy planning for lung cancer

Tumor no.

Mean GTV (cm3)

ITVall (cm3)

ITV2 (cm3)

ITVslow (cm3)

ITVall+slow (cm3)

ITV2+slow (cm3)

1

4.9

7.9

6.9

5.1

8.1

7.4

2

11.5

13.8

11.9

12.4

14.2

13.1

3

12.4

23.4

20.6

21.6

25.5

24.4

4

5.2

7.4

6.1

5.8

7.5

6.7

5

1.9

2.8

2.3

2.8

3.2

3.1

6

8.3

14.0

9.1

9.9

15.1

11.5

7

7.6

13.6

11.7

11.9

14.4

13.6

8

2.3

4.0

3.7

3.0

4.1

3.9

9

4.3

8.7

7.0

7.7

10.1

8.9

10

4.7

6.1

5.5

5.8

6.7

6.4

11

9.4

12.3

11.0

10.9

12.9

12.3

12

3.5

6.9

5.5

5.3

7.3

6.2

13

1.3

1.8

1.5

1.4

1.8

1.7

14

16.0

24.0

20.3

15.9

25.6

23.6

15

24.7

30.1

27.5

25.4

31.5

29.5

Mean ± SD

7.9 ± 6.3

11.8 ± 8.3

10.0 ± 7.5

9.7 ± 7.0

12.5 ± 8.9

11.5 ± 8.3