Skip to main content

Advertisement

Table 2 Values of V eff and mean FED

From: What is the appropriate size criterion for proton radiotherapy for hepatocellular carcinoma? A dosimetric comparison of spot-scanning proton therapy versus intensity-modulated radiation therapy

ID. Nominal diameter of GTV (cm) V33 V42 Veff* DMean Mean FED*
   IMRT (%) SSPT (%) IMRT (%) SSPT (%) IMRT SSPT p-value IMRT (Gy) SSPT (Gy) IMRT (Gy) SSPT (Gy) p-value
1 3.4 21.4 19.3 18.1 15.9 0.56 0.29 0.021 24.4 16.3 35.9 20.2 0.012
2 4.8 26.4 19.1 20.8 14.2 0.49 0.30 21.4 16.4 33.1 20.1
3 5.1 18.7 15.9 15.5 14.5 0.46 0.25 19.8 13.6 30.3 16.6
4 5.4 25.4 17.8 17.9 17.9 0.40 0.24 24.2 17.7 32.8 15.2
5 6.3 31.2 21.2 23.2 20.2 0.47 0.33   37.9 22.4 37.9 19.9  
6 7.8 61.8 30.0 40.9 28.3 0.70 0.47 < 0.001 36.9 27.4 52.5 33.1 < 0.001
7 8.2 67.5 27.3 59.7 27.3 0.72 0.49 36.1 28.1 54.5 32.5
8 8.3 76.9 41.2 42.7 27.7 0.62 0.32 32.7 17.4 56.7 24.2
9 8.7 70.0 45.6 60.4 27.9 0.75 0.53 38.3 28.6 58.1 33.3
10 11.1 61.3 39.8 60.2 28.2 0.76 0.44 38.8 24.4 67.9 27.3
11 12.1 89.5 50.9 67.3 30.9 0.83 0.57 41.9 31.7 75.4 32.4
12 14.6 70.9 48.2 55.3 29.7 0.73 0.45 37.1 25.6 64.2 30.4
13 16.1 64.7 48.5 62.4 37.9 0.86 0.55 42.4 30.3 78.4 31.5
ave. 8.6 52.7 32.7 41.9 24.7 0.64 0.40   33.2 23.4 52.1 25.9  
  1. *The values of Veff and mean FED were normalized to 1.5 Gy per fraction, assuming an α/β of 2.5.