Radiological apparatus comprising a base adapted to be resting on a floor, an X-ray emitter, an X-ray receptor, a table with a patient plane and a movement system for said table; wherein said movement system comprises: - a first rod hinged at a first end to a first fixed point of said base, - a second rod hinged at a first end to a second fixed point of said base, said second point being at a predetermined and fixed distance from said first point, - a first motorized carriage adapted to slide along a first rail of said table, - a second motorized carriage adapted to slide along a second rail of said table, said second rail being distinct from or coinciding with said first rail; wherein a second end of said first rod is hinged to said first carriage; wherein a second end of said second rod is hinged to said second carriage; and further comprising means adapted to constrain the rotation of said first rod and/or of said second rod; characterized by comprising a spring actuator adapted to apply torque on said first or second rod; wherein said first or second rod is adapted to rotate along a rotatory stroke between a first end angular position and a second end angular position, wherein said actuator: - does not apply torque when said first or second rod (102, 103) is in a predetermined intermediate angular position between said first end angular position and said second end angular position, - applies torque directed toward said predetermined intermediate angular position when said first or second rod (102, 103) is in said first end angular position, - applies torque directed toward said predetermined intermediate angular position when said first or second rod (102, 103) is in said second end angular position; and wherein said actuator is adapted to accumulate energy when said first or second rod rotates from said predetermined intermediate angular position to said first end angular position and when said first or second rod (102, 103) rotates from said predetermined intermediate angular position to said second end angular position. - a first rod hinged at a first end to a first fixed point of said base, - a second rod hinged at a first end to a second fixed point of said base, said second point being at a predetermined and fixed distance from said first point, - a first motorized carriage adapted to slide along a first rail of said table, - a second motorized carriage adapted to slide along a second rail of said table, said second rail being distinct from or coinciding with said first rail; wherein a second end of said first rod is hinged to said first carriage; - does not apply torque when said first or second rod (102, 103) is in a predetermined intermediate angular position between said first end angular position and said second end angular position, - applies torque directed toward said predetermined intermediate angular position when said first or second rod (102, 103) is in said first end angular position, - applies torque directed toward said predetermined intermediate angular position when said first or second rod (102, 103) is in said second end angular position; and wherein said actuator is adapted to accumulate energy when said first or second rod rotates from said predetermined intermediate angular position to said first end angular position and when said first or second rod (102, 103) rotates from said predetermined intermediate angular position to said second end angular position.