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Table 1 Field parameters

From: A single-field integrated boost treatment planning technique for spot scanning proton therapy

Patient Field Gantry/Couch Max/Min Energy (MeV) Max/Min Range (cm2/g) σairfor Max/Min Energy (cm) Number of Energy Layers Spot spacing (cm)
1 Left vertex 1 60°/290° 138.1/91.1 13.3/6.2 0.80/1.16 30 1.2
Posterior 180°/0° 144.9/106.6 14.5/8.3 0.77/1.02 22 1.2
Left vertex 2 95°/290° 134.6/91.9 12.7/6.3 0.82/1.16 29 1.2
2 Posterior 180°/0° 132.8/79.7 12.4/4.8 0.83/1.33 37 1.1
3 Right lateral 270°/0° 198.3/155.3 25.2/16.4 0.59/0.73 19 0.64
Left Lateral 90°/0° 198.3/155.3 25.2/16.4 0.59/0.73 19 0.64
4 Right anterior 300°/15° 143.2/96.9 7.5/0.3* 0.95/1.59 32 1.0
Right lateral 270°/15° 139.8/96.9 6.9/0.3* 0.97/1.59 30 1.0
  1. Abbreviations: Max maximum, Min minimum, E energy, R range, σ air sigma of spot in air at the isocenter. Spot spacing, center-to-center distance of spot. *With a range shifter of 6.7 g/cm2.