Tunnel computerised tomographic scanner and method for acquiring images from a scintillator of a tunnel computerised tomography scanner

A tunnel computerised tomographic scanner comprising:

• a supporting structure (2);
• a rotor (3) supported by the supporting structure (2) and rotatable relative to the supporting structure (2) about an axis of rotation, the rotor (3) surrounding a detecting zone (4) through which the axis of rotation passes;
• a motor connected to the rotor (3) for driving its rotation about the axis of rotation;
• an X-ray emitter (7) mounted on the rotor (3);
• an X-ray detector (8) mounted on the rotor (3), on an opposite side of the detecting zone (4) relative to the X-ray emitter (7), the X-ray detector (8) comprising at least one scintillator (9) which has at least one emission face (10) from which the scintillator (9) emits light in the visible spectrum when it is struck by X-rays;
• an electronic processing unit connected to the X-ray detector (8) and programmed to combine first images acquired by the X-ray detector (8), in a plurality of separate angular positions of the rotor (3) around the axis of rotation, for reconstructing a three-dimensional structure of an object (6) placed in the detecting zone (4);
• wherein:
• the X-ray detector (8) also comprises a plurality of video cameras (12) which are connected to the electronic processing unit, each video camera (12) being positioned in such a way as to frame at least one portion of the scintillator (9), for acquiring, in each of said separate angular positions of the rotor (3), second images, in the visible spectrum, of the respective portion of the scintillator (9);
• at least two separate video cameras (12) of said plurality of video cameras substantially frame each zone of the at least one emission face (10) of the scintillator (9), and the electronic processing unit is programmed to obtain each first image by combining all of the second images obtained by the video cameras (12).