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Table 2 The main dosimetric and volumetric data observed in our patients' group.

From: Toxicity and cosmesis outcomes after single fraction partial breast irradiation in early stage breast cancer

Parameter Median Min Max
CTV volume (cc) 79 15 240
PTV volume (cc) 96 17 290
PTV minimum dose (cGy) 1804 829 1988
PTV mean dose (cGy) 2112 1797 2181
PTV maximum dose (cGy) 2185 1870 2247
Whole breast volume (cc) 892 230 2608
Whole breast mean dose (cGy) 971 436 1411
INBV (cc) 743 205 2441
INBV mean dose (cGy) 740 100 1153
Skin volume (cc) 165 64 385
Skin mean dose (cGy) 544 246 845
V2.1 Gy (%) 84 41 99
V18.0 Gy (%) 20 5 41
V21.0 Gy (%) 9 0 28
V21.0 Gy (cc) 67 0 263
PTV/WB 12% 3% 26%
  1. Abbreviations: WB = Whole breast; INBV = WB volume -PTV; PTV/WB = ratio between PTV and WB volume; VXGy(%) or VXGy(cc), that represent the percent of the breast volumes or the volume (cc) receiving more than × Gy, respectively.