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Table 4 Planned Target Volume (PTV) Data.

From: Dosimetric impact of target definitions on normal structures in head and neck cancer

  RTOG 3Dose p
Volumes (cc)    
   PTV-HD 293.6 111.6 <0.001
   PTV-ED 704.8 545.2 <0.001
   PTV Total 998.4 837.3 <0.001
Doses    
   PTV-ED heterogeneity (%)    
110% 36.549 14.870 0.002
115% 15.086 2.716 <0.001
   93% Target Coverage (%)    
PTV-HD 99.823 99.994 0.049
PTV-ED 99.449 99.705 0.06
   Mean Target Doses (cGy)    
PTV-HD 7357.63 7240.90 0.01
PTV-ED 6099.57 5935.40 0.001
PTV Total 6468.31 6281.12 <0.001
   Mean MUs 1675 1556 0.01
  1. Abbreviations: RTOG = two dose level plan; 3Dose = three dose level plan; PTV-HD = high dose PTV; PTV-ED = elective dose PTV; PTV Total = sum of PTV-HD, PTV-ED, and PTV-ID; MUs = monitor units