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Table 7 Comparison of dosimetric parameters for OARs between different beam arrangements

From: Optimal beam arrangement for pulmonary ventilation image-guided intensity-modulated radiotherapy for lung cancer

Parameter

Anatomic plan

Functional plan

 

FESB

FMOB

P value

FESB

FMOB

P value

Spinal cord

      

Dmax (Gy)

37.1±7.1

32.7±13.3

0.101

37.1±7.8

33.0±7.0

0.113

Esophagus

      

Dmean (Gy)

22.0±10.4

16.3±11.6

0.001

22.7±10.3

16.2±11.6

0.001

Dmax (Gy)

58.1±9.6

53.4±12.0

0.013

57.6±10.4

53.2±12.4

0.020

Heart

      

V40

17.2±11.1

21.7±16.3

0.144

17.2±11.7

20.9±15.7

0.167

V45

13.1±9.1

17.9±13.5

0.057

13.4±10.1

16.3±13.0

0.194

V60

5.9±4.6

10.3±9.8

0.032

5.8±5.0

9.7±9.9

0.048

  1. Abbreviations: OARs Organs at risk, D max Maximum dose, D mean Mean dose, Vx Percentage of volume receiving > x Gy, FESB Five equally-spaced beams, FMOB Five manually optimized beams, Data presented as mean±standard deviation.
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Radiation Oncology

ISSN: 1748-717X

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