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Table 2 Gross target volume (GTV) and planning target volume (PTV) of the entire cohort of patients treated for single large brain metastases (BMs)

From: Hypo-fractionated stereotactic radiotherapy alone using volumetric modulated arc therapy for patients with single, large brain metastases unsuitable for surgical resection

Median GTV and range for the entire cohort 16.3 cm3(3.9–64.5 cm3)
GTV cm3 (range cm3) n. patients %
≤4 (3.9–4) 9 8.8
4.1–10 (4.36–9.76) 27 26.5
10.1–20 (10.88–19.81) 30 29.4
21–40 (22.63–39.37) 21 20.6
>40 (42.61–64.5) 15 14.7
Median PTV and range for the entire cohort 33.7 cm3(9.2–122.3 cm3)
PTV cm3 (range cm3) n. patients %
<10 (9.2–10) 9 8.8
>10–24 (10.1–23.1) 27 26.5
>20–38 (21.2–36.7) 30 29.4
40–85 (40–72.37) 21 20.6
>85 (88.6–122.3) 15 14.7