A radiological imaging system including a bed extending along a main direction, and a load-bearing structure supporting the bed in a raised position. The system includes a collapsible gantry having a circular trajectory of expansion lying on a positioning plane, and the collapsible gantry includes a source to emit radiation and a detector to receive the radiation. The gantry also includes a casing housing the source and the detector. The casing includes a fixed arched module and a mobile arched module. There is a rotation mechanism suitable to rotate the collapsible gantry in relation to the bed and the load-bearing structure to vary the inclination of the positioning plane in relation to the main direction. There is also a kinematic expansion mechanism connected to the casing to translate the mobile arched module with respect to the fixed arched module.
