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Table 2 Treatment details

From: Repeat stereotactic body radiotherapy (SBRT) for local recurrence of non-small cell lung cancer and lung metastasis after first SBRT

First SBRT

Dose (Gy/fr)

48/4 [105.6]: 50/4 [112.5]: 52/4 [119.6]:

9: 13: 3:

36/2 [100.8]: 50/10 [75]:

1: 1:

60/8 [105]: 55/10 [85.3]

3: 1

PTV (cc)

Median (range)

38.5 (7.7–107.6)

PTV D98 (%)

Median (range)

94.0 (78.8–97.0)

PTV D95 (%)

Median (range)

95.0 (80.5–99.0)

PTV Dmedian (%)

Median (range)

100.3 (96.0–103.4)

PTV D2 (%)

Median (range)

104.6 (99.2–112.0)

ITV (cc)

Median (range)

17.9 (1.7–61.3)

ITV Dmedian (%)

Median (range)

100.8 (96.2–103.5)

Lung V20Gy (%)

Median (range)

4.6 (1.6–11.1)

Second SBRT

Dose (Gy/fr)

48/4 [105.6]: 50/4 [112.5]: 52/4 [119.6]:

6: 3: 4:

54/6 [102.6]: 60/8 [105]: 55/10 [85.3]:

1: 13: 1:

60/15 [84]: 48/16 [64.2]

2: 1

PTV (cc)

Median (range)

69.8 (10.2–149)

PTV D98 (%)

Median (range)

93.8 (86.8–100.8)

PTV D95 (%)

Median (range)

96.0 (86.0–100)

PTV Dmedian (%)

Median (range)

100.5 (94.8–105.3)

PTV D2 (%)

Median (range)

105.4 (100.2–113)

ITV (cc)

Median (range)

38.4 (1.5–106)

ITV Dmedian (%)

Median (range)

100.6 (97.6–105)

Lung V20Gy (%)

Median (range)

6.5 (2.4–14.5)

Total PTV Dmedian (BED10, Gy)

Median (range)

215.0 (139.4–240.6)

Total Dmax (EQD2, α/β = 3, Gy)

 Proximal bronchial tree

Median (range)

226.7 (1.7–322.3)

 Esophagus

Median (range)

19.4 (0.8–146.8)

 Great vessels

Median (range)

111.2 (9.3–317.1)

  1. PTV planning target volume, Dx dose received by x% of PTV, V20Gy volume receiving 20 Gy, BED10 biologically effective dose-10 Gy, EQD2 equivalent dose in 2-Gy fractions. Figures in [] are BED10 in Gy