Inclusion Criteria:  Written consent of the patient Age between 18 and 80 years Planned for supra- or infratentorial (partial) resection of space occupying lesion (benign or malignant) or vascular neurosurgical procedure (clipping of an aneurysm, resection of an arteriovenous malformation, resection of cavernoma) Patients planned for MRI or CT follow-up within 72 hours after surgery  Exclusion Criteria:  No informed consent Operation using only one burr hole (e.g. biopsy) Not able to fill out the questionnaires due to cognitive impairment or aphasia Not understanding German or English language Contraindication for MRI examination No postoperative MRI or CT examination planned within 72 hours after surgery