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Table 1 Dose-volume metrics for DIBH and FB treatment plans

From: Dose reduction to organs at risk with deep-inspiration breath-hold during right breast radiotherapy: a treatment planning study

MetricBreast OnlyBreast + SC onlyBreast + RNI
FBDIBHP valueFBDIBHP valueFBDIBHP value
CTV
 Mean (Gy)40.9 ± 0.440.9 ± 0.40.640.9 ± 0.340.8 ± 0.30.840.6 ± 0.240.6 ± 0.20.5
 V95% (%)99.4 ± 0.799.5 ± 0.8199.4 ± 0.498.7 ± 1.50.3100.0 ± 0.0399.9 ± 0.21
Lung (total)
 Mean (Gy)2.4 ± 0.52.3 ± 0.80.33.5 ± 0.53.1 ± 0.50.0110.8 ± 1.78.9 ± 1.20.002
 V20Gy (%)4.1 ± 0.54.0 ± 1.90.46.7 ± 1.25.4 ± 1.20.0225.2 ± 7.617.9 ± 5.10.002
 V5Gy (%)9.6 ± 2.38.7 ± 3.20.313.9 ± 2.312.4 ± 1.60.0251.0 ± 3.547.4 ± 3.20.004
 Volume (cm3)2613.2 ± 728.14467.6 ± 649.00.0012714.8 ± 595.04452.0 ± 591.50.0012714.8 ± 595.04452.0 ± 591.50.001
Lung (ipsilateral)
 Mean (Gy)4.4 ± 1.04.3 ± 1.50.46.3 ± 0.95.6 ± 0.90.0518.9 ± 3.215.9 ± 2.30.002
 V20Gy (%)7.6 ± 2.37.5 ± 3.60.412.0 ± 2.29.8 ± 2.20.0345.3 ± 13.332.9 ± 9.40.002
 V5Gy (%)17.6 ± 4.316.4 ± 6.00.325.1 ± 4.022.7 ± 3.10.0691.6 ± 5.686.7 ± 7.10.01
Liver
 Max. (Gy)22.3 ± 15.79.2 ± 13.60.00632.4 ± 11.010.4 ± 10.80.00131.3 ± 13.315.3 ± 9.80.002
 V20Gy (cc)9.2 ± 18.91.8 ± 5.60.0310.8 ± 17.20.8 ± 2.60.00124.3 ± 38.40.8 ± 2.20.02
Heart
 Mean (Gy)0.2 ± 0.10.2 ± 0.10.70.3 ± 0.10.4 ± 0.10.22.6 ± 0.82.1 ± 0.70.09
 Max. (Gy)2.4 ± 0.52.5 ± 0.40.51.6 ± 0.51.7 ± 0.40.927.8 ± 7.621.5 ± 6.60.02
LAD
 Mean (Gy)0.03 ± 0.020.03 ± 0.020.70.1 ± 0.040.1 ± 0.030.20.5 ± 0.20.6 ± 0.20.1
 Max (Gy)0.1 ± 0.10.1 ± 0.10.40.2 ± 0.10.2 ± 0.10.11.2 ± 0.81.2 ± 0.70.9
RCA
 Mean (Gy)0.7 ± 0.30.6 ± 0.30.40.9 ± 0.21.0 ± 0.40.55.0 ± 2.53.5 ± 1.90.1
 Max (Gy)1.1 ± 0.41.0 ± 0.50.51.6 ± 0.51.7 ± 0.40.711.6 ± 7.25.6 ± 2.90.03
  1. All data (n = 10) are presented as mean ± SD
  2. Abbreviations: CTV clinical target volume, DIBH deep inspiration breath-hold, FB free-breathe, LAD left anterior descending artery, RCA right coronary artery, RNI regional nodal irradiation, SC supra-clavicular