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Table 1 Comparison of dosimetric data in patients’ plans with and without CPAP

From: CPAP (Continuous Positive Airway Pressure) is an effective and stable solution for heart sparing radiotherapy of left sided breast cancer

  With CPAP Median (SD) Without CPAP Median (SD)  
Lung Volume (cc) 1506 (348) 945 (220.5) p < .0001
Mean Lung Dose (both lungs) 6.68 Gy (5.8) 6.39 Gy (3.5) p = 0.42
Lung V5 26.3%(11.9) 25.9 (16.6) p = 0.87
Lung V10 15.9%(9.18) 16.4 (14.75) p = 0.41
Lung V20 11.3%(7.7) 11.74 (13.7) p = 0.22
Heart Volume (cc) 351.9 (84.97) 352.8 (122.6) p = 0.17
Mean Heart Dose 1.34 Gy (0.72) 2.45 Gy (1.9) p = .0075
Heart V2.5Gy 7.9%(10.2) 19.51% (12.12) p = .0022
Heart V10 15.88%(9.2) 16.4 (14.8) p = 0.41
  1. SD Standard deviation
  2. Vx connoted the volume of the organ receiving “x” dose