METHODS AND APPARATUS FOR X-RAY IMAGING WITH FOCAL SPOT DEFLECTION
First Claim
Patent Images
1. An x-ray tube comprising:
- a cathode configured to emit electrons; and
an anode having a target with a target surface defining a target angle, the emitted electrons deflected onto the target surface, and wherein the target surface is substantially aligned with a z-axis parallel to a gantry rotation axis.
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Abstract
Methods and apparatus for x-ray imaging with focal spot deflection are provided. The apparatus includes an x-ray tube having a cathode configured to emit electrons and an anode having a target with a target surface defining a target angle. The emitted electrons are deflected onto the target surface with the target surface substantially aligned with a z-axis parallel to a gantry rotation axis.
24 Citations
27 Claims
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1. An x-ray tube comprising:
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a cathode configured to emit electrons; and an anode having a target with a target surface defining a target angle, the emitted electrons deflected onto the target surface, and wherein the target surface is substantially aligned with a z-axis parallel to a gantry rotation axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A computed tomography (CT) system comprising:
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a gantry having a gantry opening therethrough defining a z-axis, the gantry configured to rotate about the z-axis; and a radiation source coupled to the gantry, the radiation source utilizing focal spot deflection to project x-rays into the gantry opening and wherein the radiation source is offset from the z-axis. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for generating x-ray beams with an x-ray tube, the method comprising:
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generating a plurality of deflected focal spots along a target of the x-ray tube; and aligning an angled surface of the target with a z-axis along which x-ray beams generated by the deflected focal spots are projected.
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Specification