An attempt at comparing CT images of petrous bone with analogical sections of anatomical specimens.

The purpose of the paper was to present comparative laminar anatomy of human temporal bone on the basis of cross-sections of autopsy specimens and CT scans made in identical thin layers. The investigations were made on 20 temporal bones taken during anatomopathological dissections of cadavers of men and women (aged 40 to 60 a) without visible pathological changes in the skull. The CT examinations were made by means of a Siemens Somatom DR 2 apparatus, using high resolution programme, on 10 patients who had pathological changes in the ear. The obtained scans were compared with temporal bone cross-sections, schemas of regular anatomical relation of 8 layers corresponding to routine CT examinations were worked out.