IDH1 and oligodendroglioma: Data sets of 25 patients were excluded due to poor patient compliance, resulting in movement artifacts and insufficient image quality, or due to erroneous MRI data acquisition with false MRI parameter settings (14 glioblastomas, IDH wildtype (WHO grade 4); 4 astrocytoma, IDH mutant (WHO grade 3); 2 astrocytoma, IDH mutant (WHO grade 2); 5 oligodendrogliomas, IDH mutant (WHO grade 3)).