[A new era in neuroradiology. Computerised axial transverse tomography-C.A.T.T. (Emi-Scanner) and its applications (author's transl)].

With an adequate follow-up, the authors report their experience with computerised axial transverse tomography (Emi-Scanner) after its use in 500 cases. A description of the method is followed by an account of the material used in this study. They mention the safety of C.A.T.T. and the profound change which this new technique has brought about in the chronology of neuroradiological investigations. The applications of C.A.T.T. are defined in relation to conventional neuroradiological investigations. In traumatic, degenerative, infective, neoplastic and vascular disorders, as well as epilepsy, C.A.T.T. makes possible visualisation of the lesion in the majority of cases. Having dealt with each of these indications, the authors illustrate the typical appearances seen at C.A.T.T. by significant examples. C.A.T.T. reduces the proportion of angiographic and encephalographic examinations. This tendency will become even more marked with the advent of technical development which improve the power of resolution of C.A.T.T.