title: [Proton spin tomography in diseases in the petrous bone region].
abstract: Magnetic resonance tomography (MRI = magnetic resonance imaging) can provide sectional images of the petrous bones in all planes. It is complementary to computed tomography (CT) and can demonstrate inflammatory changes in the petrous bones and mastoids, and cholesteatomas, with accuracy and without artifacts. MRI is inferior to CT for the demonstration of bone destruction and this this limits its use in the diagnosis of glomus tumours. The use of special surface coils combined with thin sections and a gradient-zoom technique provides high resolution images which approach the quality of modern CT examinations. This opens new possibilities for the diagnosis of small acoustic neuromas; because of the excellent tissue contrast, they can be well demonstrated without using intravenous contrast media or intrathecal air (CT-air meatography).
mesh_terms: D000328:Adult; D002781:Cholesteatoma / Q000175:diagnosis*; D004427:Ear Diseases / Q000175:diagnosis; D005260:Female; D005925:Glomus Jugulare Tumor / Q000175:diagnosis; D006258:Head and Neck Neoplasms / Q000175:diagnosis*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008417:Mastoiditis / Q000175:diagnosis*; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000175:diagnosis; D010033:Otitis Media / Q000175:diagnosis; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed
vernacular_title: Kernspintomographie bei Erkrankungen im Bereich des Felsenbeins.