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Table 4 Dose to the organs at risk (OAR) in proton treatment plans (57.6 Gy total dose)

From: Influence of 68Ga-DOTATOC on sparing of normal tissue for radiation therapy of skull base meningioma: differential impact of photon and proton radiotherapy

Parameter CT-MRI
(Gy, median, range)
CT-MRI-PET
(Gy, median, range)
p-value
Brain Stem
 Dmax 54.3 (52.3–56.0) 54.6 (52.4–57.6) 0.859
 Dmedian 12.5 (0.7–41.5) 5.7 (0.48–35.8) 0.008*
Optic Chiasm
 Dmax 53.4 (1.9–55.8) 53.6 (1.9–55.3) 0.767
 Dmedian 42.0 (0.3–51.3) 40.4 (0.3–50.3) 0.139
Left optic nerve
 Dmax 53.7 (0.4–57.2) 53.2 (0.4–57.5) 0.953
 Dmedian 38.6 (0.0–52.3) 29.9 (0.0–51.9) 0.008
Right optic nerve
 Dmax 52.9 (0.2–53.8) 52.7 (0.2–55.2) 0.953
 Dmedian 16.3 (0.0–51.3) 7.0 (0.0–51.5) 0.021*
  1. *Significant difference <0.05