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Table 2 Technical and dosimetric data

From: Accelerated partial breast irradiation in the elderly: 5-year results of high-dose rate multi-catheter brachytherapy

Data Mean Median Interval
#needles 9 8 [5 – 16]
#plans 2 2 [1 – 3]
CTV (cc) 82.3 75.2 [16.9 – 210]
Dose/f (Gy) 3.4 3.4 [3.4 – 4]
#fractions 10 10 [8 – 10]
Total dose (Gy) 34 34 [32 – 34]
Time interval S/B (d) 17.5 12 [5 – 105]
D90     
 Gy   3.7 3.7 [2.2 – 8.4]
 %   106.2 107.1 [64.1 – 125.9]
 EQD2 (Gy)   43.6 43.3 [35 – 72.6]
D100     
 Gy   2.6 2.7 [1 – 6.6]
 %   74.8 77.5 [26 – 100.9]
 EQD2 (Gy)   37.4 37.7 [26.9 – 59.8]
V100     
 cc   76.4 72.2 [16.4 – 192]
 %   93.3 95 [68.9 – 100]
V150     
 cc   36.3 30.6 [7.4 – 96]
 %   44.3 43 [22.1 – 81.2]
V200     
 cc   13.6 11.2 [3.2 – 51.6]
 %   17.1 16.6 [9.4 – 47.3]
DHI 52.8 53.6 [18.8 – 73]
  1. #needles: number of needles; #plans: number of plans; CTV: clinical target volume; Dose/f: dose per fraction; #fractions: number of fractions; Time interval S/B: time interval between surgery and brachytherapy; D90: dose delivered to 90% of the CTV; D100: dose delivered to 100% of the CTV; V100: part of the CTV receiving 100% of the prescribed dose; V150: part of the CTV receiving 150% of the prescribed dose; V200: part of the CTV receiving 200% of the prescribed dose; DHI: Dose Homogeneity index (1-V150/V100); EQD2: equivalent dose at 2 Gy using an αβ = 4 for breast tissue and breast tumour.