CT Scanner

A scanning method for making a CT computed tomography comprising a source arranged to generate cone beam x-ray radiation, wherein the cone beam vertex is in the source defining a collimated cone, a detector arranged in so that said radiation generates a primary footprint completely contained on a surface of the detector and processing means configured to generate a digital image corresponding to a signal generated by the detector when illuminated by said radiation and configured to reconstruct a three-dimensional attenuation map of a volume containing a sample under investigation, the method including

• a first step of making said source perform a first tilting movement around an axis of rotation;
• a second step of making said source perform a second alternating movement, parallel to said axis of rotation so as to identify an approximately sinusoidal motion on a cylindrical or hemicylindrical surface coaxial with said axis of rotation, having a predetermined amplitude;
• a third step of collimating said beam so as to illuminate only an axial fraction of said volume;
• a fourth step of performing two or more illuminations of the volume so that an entire axial extension of said lateral surface is irradiated through an entire period of oscillation comprising a predetermined number of footprints so that said axial extension is equal to the product of said axial fraction for said predetermined number of footprints;
• and
• a fifth step of limiting said digital image by eliminating pixels outside said primary footprint.