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Table 4 DVH analysis for OAR of the groups breast, lung and neurocranium for treatment plans created with FF and FFF beams

From: The impact of flattening-filter-free beam technology on 3D conformal RT

Parameter

Breast

Neurocranium

Lung

  

OAR

 

n

13

11

7

  

Left eye

 

Mean+SD [Gy]

-

8.3 ± 2.4

-

-

7.3 ± 2.4

-

p

-

0.000

-

  

Right eye

 

Mean+SD [Gy]

-

9.1 ± 2.4

-

-

8.1 ± 2.4

-

p

-

0.000

-

  

Ipsilateral lung

 

Volume [cm3] Mean+SD [Gy]

1791.2 ± 313.6

-

2018.6 ± 319.2

9.1 ± 1.5

-

17.6 ± 2.8

8.9 ± 1.5

-

17.5 ± 3.2

p

0.000

-

0.700

V20Gy [%]

17.7 ± 3.5

-

43.0 ± 7.1

 

17.6 ± 3. 4

-

40.6 ± 9.4

p

0.042

-

0.189

  

Contralateral lung

 

Volume [cm3]

1660.2 ± 394.7

-

2479.0 ± 806.2

Mean+SD [Gy]

0.6 ± 0.1

-

6.8 ± 4.6

0.5 ± 0.0

-

6.8 ± 3.5

p

0.011

-

0.903

  

Heart

 

Volume [cm3]

555.1 ± 280.4

-

-

Mean+SD [Gy]

2.9 ± 2.0

-

11.0 ± 5.5

2.8 ± 2.1

-

11.8 ± 5.6

p

0.018

-

0.011

  1. FFF results are in bold. VxGy volume receiving at least x Gy. Vx volume receiving at least x % of the prescribed dose, Dx % dose received by at least x % of the volume, Statistical significance is defined for p < 0.01.