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Table 3 Summary of DVH-based analysis for OARs and healthy tissue

From: Post mastectomy linac IMRT irradiation of chest wall and regional nodes: dosimetry data and acute toxicities

Organ/Structure Parameters Plans Value (Mean±SD) P-value
Ipsilateral lung V5 All 65%±8%  
   Integrated 67%±9% 0.005
   Segmented 61%±7%  
  V20 All 28%±2%  
   Integrated 28%±3% 0.980
   Segmented 28%±2%  
  Dmean (Gy) All 15.06±1.66  
   Integrated 15.11±1.54 0.658
   Segmented 14.93±1.99  
Contralateral lung V5 All 12%±11%  
   Integrated 14%±12% 0.157
   Segmented 9%±8%  
  Dmean (Gy) All 2.26±1.32  
   Integrated 2.58±1.43 0.019
   Segmented 1.66±0.83  
Heart V5 Left-sided lesions 56%±15%  
   Integrated 60%±13% 0.001
   Segmented 45%±13%  
  V10 Left-sided lesions 30%±9%  
   Integrated 31%±10% 0.076
   Segmented 26%±7%  
  V20 Left-sided lesions 13%±6%  
   Integrated 14%±7% 0.77
   Segmented 13%±4%  
  V30 Left-sided lesions 7%±3%  
   Integrated 8%±4% 0.21
   Segmented 6%±3%  
  Dmean (Gy) Left-sided lesions 8.69±1.47  
   Integrated 8.76±1.61 0.65
   Segmented 8.54±1.14  
Spinal cord Dmax (Gy) All 36.10±5.87  
   Integrated 37.24±4.55 0.009
   Segmented 33.29±7.97  
Ipsilateral humeral head Dmean (Gy) All 23.98±9.25  
   Integrated 28.22±5.60 <0.001
   Segmented 12.31±6.99  
Esophagus Dnear-max (Gy) All 41.56±7.79  
   Integrated 41.84±9.15 0.85
   Segmented 41.29±6.47  
  Dmean (Gy) All 11.14±3.11  
   Integrated 11.22±2.78 0.745
   Segmented 10.83±4.27  
Contralateral breast Dmean (Gy) All 0.98±0.46  
   Integrated 1.01±0.48 0.418
   Segmented 0.90±0.43  
  V5 All 2%±1%  
   Integrated 2%±2% 0.299
   Segmented 1%±1%  
Healthy tissue EI All 0.30±0.04  
   Integrated 0.31±0.03 0.094
   Segmented 0.28±0.05  
  1. Abbreviations: Vx: percent volume of critical structures receiving a dose of x Gy; EI: external volume index; other abbreviations as in Table 2.
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