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US 12,046,441 B2Granted
X-ray tube cathode focusing element
AssigneeGE Precision Healthcare LLC
InventorsSergio Lemaitre, Kevin Kruse
Life of this patent
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Abstract
Various methods and systems are provided for an X-ray tube cathode focusing element. In one example, a focusing element is configured with three electron emission filaments, an integrated edge focusing, and a bias voltage. The integrated edge focusing may include a continuous single architecture with rounded edges, and a voltage of the focusing element may be negatively biased relative to a voltage of the electron emission filaments.
Claims18
An imaging system, comprising:
- an anode assembly;
- and
- a cathode assembly configured to focus an electron beam on the anode assembly, wherein the cathode assembly includes a monolithic focusing element with:
- a plurality of channels each having a filament arranged therein;
- at least one recess at each of two lateral edge features;
- and
- at least two focusing features positioned between the two lateral edge features, wherein each focusing feature is positioned between two of the plurality of channels, and further wherein each focusing feature has a geometry that is specific thereto and distinct from a geometry of each other focusing feature,
- wherein each recess of the two lateral edge features is positioned at a first vertical height, with respect to a vertical axis, greater than a second vertical height of an adjacent filament.
5 more elements
A cathode for an X-ray tube, comprising:
- a cathode base;
- an insulator having a first side adjacent to the cathode base and a second side opposite the first side;
- and
- a focusing element adjacent to the second side of the insulator, the focusing element having a plurality of channels each having a filament arranged therein, and a plurality of focusing features each positioned between two of the plurality of channels, wherein each focusing feature has a geometry that is specific thereto and distinct from a geometry of each other focusing feature,
- wherein each focusing feature is configured with the associated geometry to focus electrons emitted from the filaments on either side of the focusing feature into a single electron beam for the focusing element.
2 more elements
Dependencies are inferred from the claim text.