Proceedings of the 6th European Congress of Neurosurgery [antikvár]

Acta Neurochirurgica, Suppl. 28, 319—320 (1979) © by Springer-Verlag 1979 I. Special Investigation X-ray Department, Ospedale Umberto I0*, Ancona, Italy, X-ray Department, Centre National d'Ophthalmologie des 15/20**, Paris, France, and Institute Nacional de Prevision***, Departamento "Sixto Obrador" de Neurocirugia, Madrid, Spain Computed Tomography in the Investigation of Space-Occupying Lesions of the Parasellar Region U. Salvolini*, F. Menichelli*, U. Pasquini*, E. A. Cabanis**, M.T. Iba-Zizen**, and R. Freje Martinez*** Our experience is based on 146 space-occupying lesions of the parasellar region, drawn from a series of 12,000 patients investigated at the Ancona General Regional Hospital Umberto 1° (Italy) over the course of three years. All patients were examined with an EMI Brain Scanner Mark-1. The 146 cases fell into the following categories: 37 meningiomas, 22 craniopharyngiomas, 22 gliomas, 16 vascular abnormalities, 6 traumas, 43 pathology of sinuses or bone. Obviously CT investigations were preceded by clinical examination, plain X-rays, and tomography, and followed by all the neuroradiologi-cal investigations necessary. We had no standardized method of investigation, but rather adjusted the technique to the clinical problem at hand. Nevertheless we followed certain rules that we considered essential for obtaining a valid result at parasellar level: a) immobilization of the patient; b) angulation of slices parallel to the Frankfurt plane, in addition to conventional cuts; c) 8 mm cuts, partially overlapped; d) systematic examination of scanning data on the Diagnostic Display Console, at different window level and widths; e) contrast studies: scanning was done before and after intravenous 21*