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Table 1 Comparison of dosimetric parameters for irradiation of portal vein thrombosis and target volumes and normal organs at risk (OARs) by using different treatment techniques.

From: Comparison of coplanar and noncoplanar intensity-modulated radiation therapy and helical tomotherapy for hepatocellular carcinoma

  

Coplanar IMRT

Noncoplanar IMRT

Tomotherapy

CTV

V95% (%)

98.72 ± 1.90

99.98 ± 0.02

99.97 ± 0.07

PTV

V90% (%)

99.44 ± 1.07

99.54 ± 0.61

99.84 ± 0.17

 

V95% (%)

98.83 ± 0.74

98.71 ± 1.28

99.17 ± 0.64

 

UI

1.10 ± 0.02

1.11 ± 0.03

1.04 ± 0.02#,*

 

CI

1.16 ± 0.07

1.14 ± 0.06

1.13 ± 0.04

Normal liver

V10 (%)

64.81 ± 17.86

51.91 ± 21.56

72.51 ± 13.31*

 

V20 (%)

41.36 ± 13.99

32.62 ± 14.95

32.78 ± 9.18

 

V30 (%)

21.10 ± 7.90

17.17 ± 8.85

17.00 ± 6.10

 

mean (Gy)

18.23 ± 3.11

16.14 ± 4.61

17.93 ± 2.83

Stomach

mean (Gy)

11.68 ± 5.47

9.90 ± 6.18

13.19 ± 6.05

Right Kidney

mean (Gy)

5.07 ± 4.99

6.32 ± 5.08

9.00 ± 8.94

Left Kidney

mean (Gy)

2.1 ± 3.03

2.36 ± 2.91

5.00 ± 5.27

Spinal cord

D1% (Gy)

20.98 ± 7.51

20.12 ± 9.08

22.53 ± 3.31

  1. The Vx is the percentage of normal liver volume that receives ≥ × Gy in the total normal liver volume.
  2. V90 and V95 mean volume covered by 90% and 95% of prescribed dose, respectively.
  3. UI: Uniformity index; CI: Conformal index.
  4. #: The p value is < 0.05 for comparing tomotherapy with coplanar IMRT.
  5. *: The p value is < 0.05 for comparing tomotherapy with noncoplanar IMRT.