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Table 5 The absorbed dose per 1 Gy of therapeutic dose at each organ

From: Risk of secondary cancers from scattered radiation during intensity-modulated radiotherapies for hepatocellular carcinoma

Organ

Modality\ID

Organ dose per 1 Gy (cGy/Gy)

1

2

3

4

5

Thyroid

IMRT

0.4

0.1

0.6

1.1

0.3

VMAT

0.3

0.1

0.5

0.9

0.3

TOMO

0.4

0.2

0.4

0.8

0.2

Lung

IMRT

2.6

1.1

5.2

8.8

1.8

VMAT

2.8

0.1

5.5

10.1

2.4

TOMO

6.9

3.0

11.6

16.5

6.1

Stomach

IMRT

10.5

30.7

49.3

26.0

1.7

VMAT

23.4

30.5

49.5

30.3

7.3

TOMO

28.3

46.7

53.3

43.0

13.5

Normal liver

IMRT

41.0

20.1

45.2

45.7

29.3

VMAT

42.7

18.5

38.7

54.1

30.6

TOMO

47.0

25.3

44.9

49.8

35.0

Small intestine

IMRT

1.3

0.4

1.9

4.8

0.7

VMAT

1.3

0.5

1.9

4.8

1.1

TOMO

1.4

0.3

1.9

15.7

0.6

Prostate/Ovary

IMRT

0.5

0.2

0.5

1.2

0.3

VMAT

0.4

0.1

0.5

1.0

0.3

TOMO

0.4

0.1

0.5

0.9

0.2

Rectum

IMRT

0.3

0.1

0.4

0.9

0.2

VMAT

0.3

0.1

0.4

0.7

0.2

TOMO

0.3

0.1

0.3

0.7

0.2

  1. The in-field region organs were the lung, stomach, and normal liver. The other organs were out-of-field. The doses of in-field region organs were calculated from the dose-volume histogram, and the doses of out-of-field region organs were measured by RPLGD detectors inside a humanoid phantom.
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Radiation Oncology

ISSN: 1748-717X

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