Comparison of Proton and Photon Radiotherapy of Brain Tumors (ProtoChoice-Hirn)

Inclusion Criteria: * primary brain tumor: gliomas (low or high grade), intracerebral meningiomas, pituitary adenomas, craniopharyngioma and other rare brain tumors or * brain tumor recurrence without pre-irradiation or * brain tumor recurrence with pre-irradiation \> 40 Gy in the overlap region with the recurrence region * indication for radiotherapy or radiochemotherapy * Both proton and photon therapy are possible from a medical point of view (that is no standard indication for protons or standard indication for example one-time stereotaxy * age \>= 18 years * general condition ECOG ≤ 2, outpatient basis possible * indication for high dose (except group 4) radiotherapy or radiochemotherapy * capacity to consent and present written informed consent Exclusion Criteria: * lack of capacity to consent or lack of written consent * cerebral lymphomas * brain metastases * very small tumors (for example acoustic neuromas, very small recurrences) for this is a proton therapy from a medical point of view no alternative to a stereotactic radiotherapy * inability to MRI planning (eg. contraindications to performing MRI) * lack of compliance of the patient * lack of or limited possibility of a reproducible storage (eg by severe restriction of mobility of the patient) * missing or limited possibility of regular follow-up visits in accordance with the study protocol