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Table 2 Planning objectives for radiotherapy of unilateral, intraorbital ONSM

From: Retrospective analysis of fractionated intensity-modulated radiotherapy (IMRT) in the interdisciplinary management of primary optic nerve sheath meningiomas

Priority Volume Dose constraint Minor deviation
1 Optic chiasm Dmax < 54 Gy  
2 Optic nerve Dmax < 54 Gy Dmax < 54.2 Gy
3 PTV54 D98 > 95% D98 > 90%
4 PTV51 D98 > 95% D98 > 90%
5 Retina / eye D2 < 40 Gy D2 < 54 Gy