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Table 3 Dosimetric simulation of the OARs D2cc (EQD2) at different uncertainty level

From: Intra-fractional dosimetric analysis of image-guided intracavitary brachytherapy of cervical cancer

Dose level

3.5 Gy

4 Gy

Uncertainty

15%

20%

15%

20%

EQD2(Gy)

71.3 ± 2.4

71.6 ± 3.1

76.7 ± 3.0

77.0 ± 4.0

 > 75 Gy

5.8%

13.7%

71.3%

68.0%

 > 76 Gy

2.7%

8.2%

58.5%

58.9%

 > 77 Gy

1.0%

4.7%

45.2%

49.4%

 > 78 Gy

0.4%

2.5%

32.3%

39.4%

 > 79 Gy

0.1%

1.2%

21.5%

30.1%

 > 80 Gy

0

0.6%

12.6%

22.5%

 > 85 Gy

0

0

0.3%

3.2%

 > 90 Gy

0

0

0

0.1%

  1. The di is 3.5 Gy or 4 Gy for each fraction, while the uncertainty level is 15% or 20%. And the total EQD2 is the sum of the BT dose and EBRT dose (48.38 Gy, 50.4 Gy/28f, α/β = 3)