Patent ID: 8403560

Claim:
A computed tomography system, comprising: a gantry comprising a stationary part and a rotor that rotates, relative to said stationary part, around a system axis; an x-ray tube mounted to said rotor; a closed liquid cooling system in thermal communication with said x-ray tube that cools said x-ray tube, said closed liquid cooling system comprising a fluid volume filled with cooling liquid, said fluid volume comprising respective portions located at different distances from said system axis; said fluid volume being located at said rotor and being exposed to centrifugal force during rotation of said rotor, said fluid volume comprising a compensation volume that changes in size dependent on a force acting thereon; and a mass element movably mounted on said rotor that moves due to said centrifugal force acting on said mass element during rotation of said rotor, said mass element mechanically interacting with said compensation volume to impart said force to said compensation volume in response to the centrifugal force acting on the mass element, to change said volume size of said compensation volume to exert pressure on said cooling liquid.