[MR tomography of benign brain tumors].

69 Patients with benign brain tumours were examined via MRI (30 meningiomas, 17 pituitary adenomas, 14 acoustic neuromas, and 8 craniopharyngiomas). Typical morphological characteristics and values of the MR tissue parameters (T1, T2, Rho) are presented. The combined analysis of tissue parameters and morphological details allows a satisfying differentiation between different pathohistological entities. Tumour capsule and displacement of neighbouring structures without signs of infiltrating growth are typical criteria of benign neoplasms.