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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.