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Table 3 Average MLD (Gy) and V20 (%) of gated and ITV plans as well as difference between the two (ITV-Gating) for both fractionation regimens. Range of doses is given in parentheses. The V20 limit taken from RTOG 0236 is provided in brackets

From: To gate or not to gate - dosimetric evaluation comparing Gated vs. ITV-based methodologies in stereotactic ablative body radiotherapy (SABR) treatment of lung cancer

  MLD (Gy) V20 (%) [Limit: 10 %]
Gating ITV Difference Gating ITV Difference
4 × 12 Gy 3.05 ± 1.27 (0.65, 7.08) 3.16 ± 1.34 (0.73, 7.52) 0.09 ± 0.57 (−2.14, 2.50) 3.88 ± 2.39 (0.46, 13.75) 3.96 ± 2.32 (0.37, 14.75) 0.08 ± 1.07 (−3.27, 4.09)
3 × 18 Gy 3.35 ± 1.40 (0.69, 7.59) 3.51 ± 1.48 (0.83, 8.31) 0.13 ± 0.60 (−1.72, 2.82) 4.49 ± 2.69 (0.14, 14.96) 4.69 ± 2.66 (0.54, 16.93) 0.19 ± 1.08 (−3.54, 4.52)