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US 4,360,734 AGranted
Method and apparatus for the operation of rotary anode X-ray tubes
AssigneeSiemens Aktiengesellschaft
InventorsKurt Dietz, Rudolf Friedel
Life of this patent
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AssigneeSiemens Aktiengesellschaft
InventorsKurt Dietz, Rudolf Friedel
Estimating the term…
In an exemplary embodiment, a portion of the tube vacuum envelope is disposed between the rotor and stator of the anode drive motor. Taking into account the required high voltage safety, hitherto concessions as to the anode drive had to be made. The disclosure provides an improvement in this regard in that the anode and stator are connected to the same potential until a desired rotational frequency is attained. Only then, subsequent to disconnection of the drive voltage, is the radiography voltage applied for the necessary exposure period. If necessary, subsequently a braking voltage, or again a drive voltage, respectively, can be applied to the stator. Methods and installations in which, in accordance with the disclosure, the drive of the rotary anode is intensified, are, in particular, suited for utilization in medical x-ray diagnostics, mainly computer tomography.
A method for the operation of a rotary anode x-ray tube whose anode is driven by means of a motor, between the rotor and stator of which the wall of the tube envelope is disposed, whereby, pursuant to application of a drive voltage to the stator, the rotor is brought to the desired rotational frequency, and that then, subsequent to disconnection of the drive voltage from the stator, the tube voltage, necessary for beam generation, is applied between the anode and cathode, said method further comprising connecting the rotor (8) and the stator (9) substantially to anode potential during the application of the anode voltage to the anode.
Dependencies are inferred from the claim text.