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

Table 1 Dose to the organs at risk (OAR) in IMRT treatment plans (54 Gy total dose)

Parameter	CT-MRI (Gy, median, range)	CT-MRI-PET (Gy, median, range)	p-value
Brain Stem
D_max	52.4 (39.8–55.3)	51.4 (39.7–54.7)	0.007*
D_median	11.9 (2.8–22.4)	5.5 (3.7–16.1)	0.037*
Optic Chiasm
D_max	52.5(5.7–55.2)	51.0 (5.0–53.5)	0.007*
D_median	39.9 (2.8–53.5)	37.9 (2.4–49.9)	0.203
Left optic nerve
D_max	53.8 (3.1–56.1)	52.3 (3.1–54.6)	0.017*
D_median	40.9 (1.5–52.6)	37.1 (1.5–52.9)	0.063
Right optic nerve
D_max	49.5 (1.5–55-7)	48.4 (1.5–55.0)	0.022*
D_median	28.2 (0.8–54.0)	24.7 (0.8–53.2)	0.047*

ISSN: 1748-717X