Radiographic image diagnostic apparatus and X-ray tube
AssigneeCanon Medical Systems Corporation
InventorHiroshi Hirayama
Life of this patent
Estimating the term…
Abstract
A radiographic image diagnostic apparatus according to embodiments includes an X-ray tube, a holding member, and coil control circuitry. The X-ray tube includes: a cathode that emits electrons; coils that generate electromagnetic force; and an anode that rotates about a rotation axis in response to the electromagnetic force and to generate an X-ray by receiving the electrons. The holding member holds the X-ray tube so that the X-ray tube is movable. The coil control circuitry controls a current to be supplied to the coils based on at least one of a position of the X-ray tube, a direction of the X-ray tube, or a velocity of the X-ray tube.
Claims13
A radiographic image diagnostic apparatus, comprising:
- an X-ray tube comprising
- a cathode that emits electrons;
- coils that generate electromagnetic force;
- an anode that rotates about a rotation axis in response to the electromagnetic force and generates an X-ray by receiving the electrons;
- and
- magnets that are connected to the anode and orbit on a circular orbit around a point on the rotation axis due to the rotation of the anode;
- a holding member that holds the X-ray tube so that the X-ray tube is movable;
- and
- coil control circuitry configured to control a current to be supplied to the coils based on at least one of a position of the X-ray tube, a direction of the X-ray tube, and a velocity of the X-ray tube, wherein
- the coils comprise
- floating coils that generate at least one of attraction or repulsion between the floating coil and the magnets as the electromagnetic force for causing the anode to float in space;
- and
- propulsion coils that generate at least one of attraction or repulsion between the propulsion coil and the magnets as the electromagnetic force for rotating the anode about the rotation axis.
An X-ray tube, comprising:
- a cathode that emits electrons;
- coils that generate electromagnetic force;
- an anode that rotates about a rotation axis in response to the electromagnetic force and generates an X-ray by receiving the electrons;
- and
- magnets that are connected to the anode and orbit on a circular orbit around a point on the rotation axis due to the rotation of the anode;
- wherein
- the coils that rotates the anode being prevented from contacting with the anode, and
- the coils comprise
- floating coils that generate at least one of attraction or repulsion between the floating coil and the magnets as the electromagnetic force for causing the anode to float in space;
- and
- propulsion coils that generate at least one of attraction or repulsion between the propulsion coil and the magnets as the electromagnetic force for rotating the anode about the rotation axis.
Dependencies are inferred from the claim text.