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Table 2 Proton therapy parameters

From: Proton therapy with a fixed beamline for skull-base chordomas and chondrosarcomas: outcomes and toxicity

PT dosimetry

Number (median, range)

Median GTV volume in cm3

25.6 [4.2–115.6]

Median D95

97.8 [89.2–100.0]

Median proton dose (GyRBE)

70.0 [60.0–74.0]

Dose per fraction

2 GyRBE

Number of fractions

35 [30–37]

Dose to OARs

 

Brain stem (Dmax, GyRBE)

52.85 [13.6–64.8]

Chiasma (Dmax, GyRBE)

45.9 [0.4–66.9]

Optical nerve right (Dmax, GyRBE)

43.2 [0–66.5]

Optical nerve left (Dmax, GyRBE)

44.8 [2–63.5]

Spinal cord (Dmax, GyRBE)

20.4 [0–50.9]

Temporal lobe right (Mean dose, GyRBE)

18.0 [15.0–28.0]

Temporal lobe left (Mean dose, GyRBE)

16.5 [14.0–29.3]

Hypophysis (Mean dose, GyRBE)

52.1 [32–69.8]