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Table 6 Excess relative risk (ERR) and excess absolute risk (EAR) for five patients

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

Organ

Modality\ID

ERR (EAR*)

1

2

3

4

5

Thyroid

IMRT

0.11

0.05

0.15

0.58

0.18

VMAT

0.08

0.05

0.12

0.49

0.18

TOMO

0.10

0.08

0.10

0.42

0.12

Lung

IMRT

0.03 (1.47)

0.02 (0.50)

0.04 (1.76)

2.98 (18.22)

0.34 (1.01)

VMAT

0.07 (1.51)

0.02 (0.53)

0.04 (1.95)

3.31 (22.20)

0.42 (1.26)

TOMO

0.91 (20.08)

0.39 (11.28)

0.52 (22.77)

3.76 (22.97)

2.53 (7.62)

Stomach

IMRT

0.11 (9.76)

0.13 (7.22)

0.12 (8.82)

0.33 (6.04)

0.49 (5.79)

VMAT

0.44 (9.79)

0.13 (7.28)

0.12 (8.82)

0.33 (6.04)

0.79 (9.29)

TOMO

0.44 (9.79)

0.13 (7.35)

0.12 (8.82)

0.33 (6.04)

0.38 (4.48)

Normal liver

IMRT

0.17(6.59)

0.17 (3.76)

0.18 (5.62)

0.21 (1.42)

0.52 (1.94)

VMAT

0.44 (6.60)

0.17 (3.75)

0.18 (5.64)

0.22 (1.48)

0.53 (2.00)

TOMO

0.46 (6.95)

0.20 (4.46)

0.19 (5.95)

0.23 (1.56)

0.27 (1.00)

Small intestine

IMRT

0.27 (5.16)

0.12 (1.47)

0.38 (6.08)

0.72 (4.82)

0.20 (0.85)

VMAT

0.33 (4.85)

0.13 (1.65)

0.38 (6.20)

0.72 (4.80)

0.28 (1.22)

TOMO

0.37 (5.35)

0.10 (1.20)

0.38 (6.05)

1.24 (8.31)

0.27 (0.71)

Prostate/Ovary

IMRT

0.02 (0.07)

0.01 (0.03)

0.02 (0.06)

0.18 (0.61)

0.07 (0.14)

VMAT

0.10 (0.05)

0.01 (0.01)

0.02 (0.06)

0.15 (0.49)

0.06 (0.13)

TOMO

0.11 (0.06)

0.01 (0.01)

0.02 (0.05)

0.14 (0.46)

0.05 (0.11)

Rectum

IMRT

0.07 (1.36)

0.04 (0.44)

0.09 (1.49)

0.18 (1.20)

0.06 (0.25)

VMAT

0.08 (1.12)

0.03 (0.35)

0.08 (1.26)

0.14 (0.96)

0.06 (0.26)

TOMO

0.09 (1.32)

0.03 (0.36)

0.07 (1.13)

0.14 (0.95)

0.05 (0.20)

  1. * EAR: per whole prescribed dose.