Skip to main content

Table 1 Summary of DVH based analysis for the PTVII and PTVI

From: Simultaneous integrated boost radiotherapy for bilateral breast: a treatment planning and dosimetric comparison for volumetric modulated arc and fixed field intensity modulated therapy

  PTVII-PTVI (left and right) PTVI (left and right)
  RapidArc IMRT p RapidArc IMRT p
Mean (Gy) 50 50 - 59.6 ± 0.9 58.0 ± 0.9 0.004
EUD (Gy) 48.5 ± 0.6 47.6 ± 0.8 0.003 58.9 ± 0.7 57.7 ± 1.0 0.004
D 5% -D 95% (Gy) 7.3 ± 1.4 11.0 ± 1.1 0.004 3.4 ± 0.7 5.8 ± 0.9 0.50
D 2% (Gy) 55.8 ± 1.1 57.2 ± 1.6 0.004 62.3 ± 0.8 61.9 ± 1.4 0.145
D 98% (Gy) 45.1 ± 1.2 43.4 ± 1.3 0.004 55.8 ± 1.3 54.1 ± 1.3 0.035
V 90% (%) 97.8 ± 2.4 94.0 ± 3.5 0.004 99.3 ± 1.5 97.5 ± 3.0 0.035
V 107% (%) 8.3 ± 5.1 14.0 ± 5.3 0.004 0.0 ± 0.0 0.0 ± 0.0 0.004
V 110% (%) 4.0 ± 2.3 8.5 ± 4.3 0.035 0.0 ± 0.0 0.0 ± 0.0 -
  PTVII left PTVII right
  RapidArc IMRT p RapidArc IMRT p
Mean (Gy) 51.0 ± 0.3 50.8 ± 0.3 0.004 50.9 ± 0.8 50.5 ± 0.6 0.145
EUD (Gy) 48.8 ± 0.7 47.7 ± 0.9 0.002 48.7 ± 0.6 48.0 ± 0.7 0.06
D 5% -D 95% (Gy) 9.7 ± 0.9 14.2 ± 1.4 0.363 9.8 ± 1.8 10.5 ± 1.3 0.363
D 2% (Gy) 60.6 ± 1.3 59.7 ± 1.4 0.363 60.2 ± 1.6 59.7 ± 1.7 0.145
D 98% (Gy) 45.2 ± 1.5 43.6 ± 1.6 0.004 45.2 ± 1.3 43.5 ± 1.0 0.004
V 90% (%) 98.0 ± 2.1 94.7 ± 3.4 0.004 95.7 ± 2.4 93.3 ± 2.4 0.004
V 110% (%) 10.4 ± 2.6 14.2 ± 5.5 0.035 10.1 ± 5.2 13.4 ± 5.6 0.004
  PTVI left PTVI right
  RapidArc IMRT p RapidArc IMRT p
Mean (Gy) 59.4 ± 1.1 58.6 ± 1.4 0.06 59.7 ± 0.8 58.5 ± 0.6 0.004
EUD (Gy) 59.8 ± 0.5 58.3 ± 0.7 0.03 59.7 ± 0.9 57.4 ± 1.3 0.005
D 5% -D 95% (Gy) 5.8 ± 0.6 7.4 ± 1.0 0.5 4.3 ± 1.0 5.7 ± 1.5 0.145
D 2% (Gy) 62.1 ± 1.2 60.3 ± 1.8 0.5 62.2 ± 0.6 62.2 ± 1.6 0.145
D 98% (Gy) 55.7 ± 1.4 54.0 ± 1.2 0.004 56.0 ± 1.3 54.3 ± 1.3 0.035
V 90% (%) 99.5 ± 0.6 98.5 ± 2.0 0.035 99.5 ± 0.8 97.9 ± 2.5 0.035
V 110% (%) 0.0 ± 0.0 0.2 ± 0.5 0.5 0.0 ± 0.0 0.0 ± 0.0 -
  1. Data are reported as mean ± 1 standard deviation computed over the cohort of 10 patients.
  2. Dx% = dose received by the x% of the volume; Vx% = volume receiving at least x% of the prescribed dose; EUD = Equivalent Uniform Dose.
  3. * p < 0.05; ** p < 0.01