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Table 2 Dosimetric characteristics at the 42 Gy and 40 Gy step

From: Higher toxicity with 42 Gy in 10 fractions as a total dose for 3D-conformal accelerated partial breast irradiation: results from a dose escalation phase II trial

Characteristic 42 Gy (n = 17) 40 Gy (n = 31 patients, 32 tumors)
  Median Min - max Median Min - max
PTV coverage  
V100% 99 97 - 100 99 95 - 100
V95% 100 100 - 100 100 99 - 100
V90% 100 100 - 100 100 99 - 100
Ipsilateral breast
V32 Gy (%) 35 13 - 48 40 21 - 50
V24 Gy (%) 39 15 - 53 46 23 - 54
V16 Gy (%) 43 16 - 57 49 24 - 57
V8 Gy (%) 54 18 - 68 55 26 - 75
Non target breast
V40 Gy (%) 10 3 - 18 8 3 - 18
V32 Gy (%) 25 10 - 35 29 6 - 38
V20 Gy (%) 32 12 - 44 35 8 - 45
V10 Gy (%) 44 14 - 60 44 11 - 63
Ipsilateral lung
V20 Gy (%) 0 0 - 1 0 0 - 1
V10 Gy (%) 0 0 - 2 1 0 - 6
V5 Gy (%) 3 0 - 5 4 0 - 12
Heart
V20 Gy (%) 0 0 - 0 0 0 - 0
V10 Gy (%) 0 0 - 0 0 0 - 1
V5 Gy (%) 0 0 - 1 1 0 - 4
left breast cancer, n = 9    left breast cancer, n = 13