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Table 3 Dose distribution statistics

From: Volumetric modulated arc therapy with flattening filter free beams for isolated abdominal/pelvic lymph nodes: report of dosimetric and early clinical results in oligometastatic patients

Structure

Parameter

Objective

Mean±SD

 
    

From Bignardi

PTV

Mean [Gy]

50.0

44.9±0.7

44.5±0.3

Volume [cm3]

D5%-95% [Gy]

 

2.8±1.5

3.8±0.8

56.7±42.0

Standard Dev [Gy]

 

0.9±0.5

 
 

D1% [Gy]

<48.15

46.2±0.8

46.4±0.3

 

D99% [Gy]

>42.75 (36)

42.0±2.4

40.8±1.0

 

V95% [%]

 

97.7±3.2

90.2±5.2

 

CI95%

1.0

1.1±0.1

1.0±0.1

CTV

Mean [Gy]

 

45.1±0.8

45.0±0.0

Volume [cm3]

D5%-95% [Gy]

 

1.4±0.8

1.4±0.3

17.4±21.0

Standard Dev [Gy]

 

0.4±0.3

 
 

D1% [Gy]

<48.15

45.9±0.8

46.0±0.2

 

D99% [Gy]

>42.75

43.8±1.8

44.1±0.2

 

V95% [%]

100

99.7±1.3

100.0±0.0

Stomach

Mean [Gy]

 

4.2±1.9

4.0±5.5

Volume [cm3]

D1% [Gy]

 

17.9±9.0

12.2±11.7

228.8±129.2

V10Gy [%]

 

11.2±12.1

 
 

V15Gy [%]

 

5.0±6.2

 
 

V36Gy [cm3]

<1

0.05±0.08

0.1±0.5

Duodenum

Mean [Gy]

 

11.0±7.5

7.0±5.6

Volume [cm3]

D1% [Gy]

 

22.9±14.2

22.4±13.8

34.5±24.2

V10Gy [%]

 

60.8±42.6

 
 

V20Gy [%]

 

14.4±19.2

 
 

V36Gy [cm3]

<1

0.09±0.19

0.5±0.9

Small Bowel

Mean [Gy]

 

5.1±3.5

3.0±2.3

Volume [cm3]

D1% [Gy]

 

23.3±6.7

18.0±10.8

1900.9±1764.5

V10Gy [%]

 

18.6±17.0

 
 

V20Gy [%]

 

3.6±4.6

 
 

V36Gy [cm3]

<3

2.9±3.9

0.1±0.2

Liver

Mean [Gy]

 

3.4±2.5

3.6±3.9

Volume [cm3]

D1% [Gy]

 

19.2±14.5

20.2±17.3

1450.5±287.3

V10Gy [%]

 

10.2±9.6

 
 

V20Gy [%]

 

2.0±2.6

 
 

(Vliver-700)-V21Gy [cm3]

>0

724±285

 

Spinal Cord

D1% [Gy]

 

10.1±3.2

7.8±2.3

Volume [cm3]

D1ccm [Gy]

<18Gy

9.5±3.1

 

32.6±19.7

V10Gy [%]

 

12.2±19.9

 

Left Kidney

Mean [Gy]

 

4.2±3.4

2.2±2.5

Volume [cm3]

D1% [Gy]

 

11.6±8.7

8.3±8.1

162.4±36.8

V15Gy [%]

<35

3.1±7.5

1.7±5.9

Right Kidney

Mean [Gy]

 

3.9±3.6

3.1±2.9

Volume [cm3]

D1% [Gy]

 

10.7±6.9

10.4±11.2

163.4±39.9

V15Gy [%]

<35

2.9±8.6

2.8±7.1