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Table 1 The comparison of planning target volume (PTV) coverage for VMAT only, primary hybrid, and modified hybrid plan using dosimetric parameters

From: Evaluation of optimal treatment planning for radiotherapy of synchronous bilateral breast cancer including regional lymph node irradiation

  Treatment plans    
VMAT only1) Primary hybrid plan2) Modified hybrid plan3) p value p a  
PTV parameters Mean (SD) Mean (SD) Mean (SD)   1) vs 2) 1) vs 3) 2) vs 3)
V95% (%) 96.7 (1.16) 97.1 (1.58) 95.3 (2.07) 0.026 0.821 0.079 0.02
V105% (%) 0.3 (0.62) 26.7 (6.81) 6.4 (2.32) < 0.001 < 0.001 0.001 < 0.001
V110% (%) 0.0 (0) 6.2 (3.18) 0.4 (0.73) < 0.001 < 0.001 0.87 < 0.001
D98% (Gy) 44.6 (7.91) 47.5 (0.6) 47.7 (0.8) 0.145 0.225 0.181 0.992
D2% (Gy) 54.0 (2.2) 54.4 (2.3) 54.0 (1.8) 0.81 0.824 0.998 0.859
Dmean 50.3 (0.06) 51.6 (0.36) 50.5 (0.27) < 0.001 < 0.001 0.106 < 0.001
Dmax 54.0 (1.14) 59.2 (1.29) 56.2 (1.31) < 0.001 < 0.001 < 0.001 < 0.001
CI 1.50 (0.18) 1.46 (0.15) 1.49 (0.18) 0.862 0.856 0.986 0.927
HI 1.07 (0.02) 1.18 (0.03) 1.11 (0.03) < 0.001 < 0.001 < 0.001 < 0.001
  1. pa: Post-Hoc Analysis Using Tukey’s HSD test