Axial transverse tomography system

Claim 1

An axial transverse tomography system for obtaining pictures of transverse sections of a body, comprising: a support displaceable about each section to be examined; a source of X-rays on this support, emitting a thin pencil passing through this section; a detector of X-rays on said support, receiveing the part of the thin pencil non-absorbed by the passage through said section, and converting it into an electric signal whose intensity is proportional to the quantity of non-absorbed X-photons; means for amplifying said electric signal; a source of light whose intensity is time modulated by said electric signal; a photographic plate for receiving the light given out by the source of light; an optical system placed between the source and the plate and comprising a filter, said system producing from the source in the plate a two dimensional picture, the light intensity of said picture being spatially constant along a first direction and spatially variable, in accordance with a predetermined law, along a second direction perpendicular to the first direction; mechanical means acting on at least one element of the assembly: light source-optical system-photographic plate, and displacing it in synchronism with said support so that said first direction of the image on the photographic plate is constantly homothetic with the direction of the thin pencil on the examined transverse section; said predetermined law being such that the median part of the picture on the plate has a maximum intensity with respect to the parallel parts surrounding it.