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US 10,504,680 B2Granted
X-ray generation tube, X-ray generation apparatus, and radiography system
AssigneeCanon Kabushiki Kaisha
InventorsKazuya Tsujino, Yasuo Ohashi
Life of this patent
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Abstract
An X-ray generation tube including a magnetic deflection portion configured to deflect an electron beam to reduce lines of magnetic force extending to the outside of the tube, where a subject is arranged, by placement of a magnetic shielding portion including a portion that is closer to an anode than the magnetic deflection portion in a tube axial direction and that is closer to the tube center axis than the magnetic deflection portion in a tube radial direction.
Claims20
An X-ray generation tube comprising:
- a cathode including an electronic gun and a cathode member configured to hold the electronic gun;
- an anode including a transmission target configured to be irradiated with electrons and generate an X ray and an anode member configured to hold the transmission target;
- an insulating tube surrounding and extending along a tube center axis and including a first end and a second end configured to be connected to the cathode and the anode, respectively;
- at least one magnetic deflection portion disposed outside the insulating tube in a tube radial direction and arranged between the cathode and the anode in a tube axial direction;
- and
- a magnetic shielding portion including a portion that is closer to the transmission target than the magnetic deflection portion in the tube axial direction and that is closer to the tube center axis than the magnetic deflection portion in the tube radial direction.
3 more elements
An X-ray generation apparatus comprising:
- an X-ray generation tube including:
- a cathode including an electronic gun and a cathode member configured to hold the electronic gun;
- an anode including a transmission target configured to be irradiated with electrons and generate an X ray and an anode member configured to hold the transmission target;
- and
- an insulating tube surrounding and extending along a tube center axis and including a first end and a second end configured to be connected to the cathode and the anode, respectively;
- at least one magnetic deflection portion disposed outside the insulating tube in a tube radial direction and arranged between the cathode and the anode in a tube axial direction;
- a magnetic shielding portion including a portion that is closer to the anode than the magnetic deflection portion in the tube axial direction and that is closer to the tube center axis than the magnetic deflection portion in the tube radial direction;
- and
- a container configured to house the X-ray generation tube and the magnetic shielding portion,
- wherein the magnetic shielding portion is fixed to the container.
7 more elements
Dependencies are inferred from the claim text.