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Table 2 Mean dose and percentage of volume of heart, lungs and right breast irradiated

From: Dosimetric consequences of the shift towards computed tomography guided target definition and planning for breast conserving radiotherapy

Organs at Risk CT-based cumulative dose plan Conventional cumulative dose plan p-values
Heart    
   Volume ≥ 30 Gy (%) 3.6 (0.0 – 10.9) 1.4 (0.0 – 7.9) < 0.001
   Volume ≥ 20 Gy (%) 5.1 (0.0 – 14.0) 1.9 (0.0 – 9.5) < 0.001
   Volume ≥ 10 Gy (%) 9.0 (0.0 – 22.7) 4.9 (0.0 – 18.0) < 0.001
   Volume ≥ 5 Gy (%) 27.4 (9.5 – 57.4) 20.5 (0.0 – 47.7) < 0.001
   Mean dose (Gy) 5.5 (2.5 – 10.8) 4.0 (1.4 – 9.0) < 0.001
Lungs    
   Volume ≥ 30 Gy (%) 4.7 (1.2 – 10.1) 3.5 (0.0 – 9.1) 0.014
   Volume ≥ 20 Gy (%) 5.6 (1.7 – 11.1) 4.2 (0.2 – 10.2) 0.006
   Volume ≥ 10 Gy (%) 8.2 (2.6 – 14.2) 6.7 (2.5 – 14.1) 0.010
   Volume ≥ 5 Gy (%) 16.6 (5.2 – 28.1) 14.7 (7.3 – 26.6) 0.006
   Mean dose (Gy) 4.7 (2.0 – 8.4) 4.0 (2.1 – 7.4) 0.011
Right breast    
   Volume ≥ 30 Gy (%) 0.1 (0.0 – 0.9) 0.0 (0.0 – 0.0) ns
   Volume ≥ 20 Gy (%) 0.2 (0.0 – 2.9) 0.0 (0.0 – 0.0) ns
   Volume ≥ 10 Gy (%) 0.3 (0.0 – 4.7) 0.0 (0.0 – 0.2) ns
   Volume ≥ 5 Gy (%) 0.8 (0.0 – 7.8) 0.2 (0.0 – 1.8) ns
   Mean dose (Gy) 0.9 (0.3 – 2.7) 0.9 (0.5 – 1.7) ns
  1. Data presented as mean values, with ranges in parentheses