Purpose: Using hybrid x-ray/MR (XMR) systems for image guidance during interventional procedures could enhance the diagnosis and treatment of neurologic, oncologic, cardiovascular, and other disorders. Robert [Department of Radiology, Stanford University, Stanford, California 94305 and Qualcomm MEMS Technologies, San Jose, California 95134 (United States) Lillaney, Prasheel Pelc, Norbert [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Bioengineering, Stanford University, Stanford, California 94305 (United States) Shin Mihye [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Mechanical Engineering, Stanford University, Stanford, California 94305 (United States) Hinshaw, Waldo Fahrig, Rebecca [Department of Radiology, Stanford University, Stanford, California 94305 (United States) Bennett, N. Novel motor design for rotating anode x-ray tubes operating in the fringe field of a magnetic resonance imaging systemĮnergy Technology Data Exchange (ETDEWEB) Looking in the direction of the axis, one side is equipped with two circular pole surfaces, one at least of which is provided with circular pole-shoes, separated from one another by concentric grooves.
The rotor consists of a single, soft-magnetic dish which is fixed on the axis and which seals the magnetic yoke of the stator. This patent describes an X-ray tube incorporating a rotating anode. X-ray tube incorporating a rotating anode with magnetic bearings They are arranged so densely that the radiating surface will nearly have the effect of a black body. In particular the side opposite the focal spot tracks is provided with many small holes, the ratio of depth to cross-section ('pit ratio') being as large as possible: ranging from 2:1 to 10:1. The anode disk of the X-ray rotating anode is blackened on the surface outside the focal spot tracks in order to improve the heat radiation. The use of two bellows allows the seating section therebetween to move towards the other section as the rollers wear. This allows the thermal impedance to be varied and the bearing wear to be optimised therewith as well as allowing adjustment for wear. A suitable bellows arrangement allows the coolant pressure to determine the contact pressure of the seating on the bearings.
In a rotating anode x-ray tube it is proposed to mount the rotating anode, or means such as a shaft affixed to it, to rotate on bearings in a race the seating for which is cooled by a suitable coolant flow. Liquid is evaporated into the chamber from the target ring to cool the target and a method is provided of removing the latent heat of the vapor.
International Nuclear Information System (INIS)Ī rotating anode x-ray source is described which consists of a rotary anode disc including a target ring and a chamber within the anode disc.
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