X-ray computed tomography apparatus, high voltage generation device, and radiological image diagnostic apparatus
AssigneeToshiba Medical Systems Corporation
InventorSanae Harada
Life of this patent
Estimating the term…
Abstract
According to one embodiment, Switching units are configured to switch the intensity of X-rays to be generated by an anode. An X-ray controller controls the switching units to switch the intensity of the X-rays to be generated by the anode, and controls a rotor control power generator to rotate the anode. When a value approximately equal to an integer multiple of an X-ray intensity switching period designated by a user coincides with the rotor rotation period, the X-ray controller controls the rotor control power generator to shift the thermoelectron collision ranges of the anode in the first turn from thermoelectron collision ranges in the second turn.
Claims13
An X ray computed tomography apparatus, comprising:
- an X-ray tube device including a cathode configured to generate a thermoelectron, an anode configured to generate an X-ray upon receiving the thermoelectron generated by the cathode, and a support mechanism configured to support the anode to be rotatable about a rotation axis;
- an X-ray detector configured to detect the X-ray generated by the X-ray tube device;
- a rotating frame configured to support the X-ray tube device to be rotatable about a subject;
- a power generator configured to supply power to the support mechanism;
- voltage generators configured to switch, by high-speed X-ray ON/OFF control and high-speed X-ray modulation, an intensity of an X-ray to be generated by the anode;
- and
- a control circuit configured to control the voltage generators to switch the intensity of the X-ray to be generated by the anode, and control the power generator to rotate the anode, and when a value substantially equal to an integer multiple of a switching period of the intensity of the X-ray coincides with a rotation period of the anode, the control circuit is configured to control the power generator to shift at least some thermoelectron collision ranges of the anode in a first turn of the anode from thermoelectron collision ranges in a second turn of the anode.
A high voltage generation device connected to an X-ray tube device including a cathode configured to generate a thermoelectron, an anode configured to generate an X-ray upon receiving the thermoelectron generated by the cathode, and a support mechanism configured to support the anode to be rotatable about a rotation axis, comprising:
- a power generator configured to supply power to the support mechanism;
- voltage generators configured to switch, by high-speed X-ray ON/OFF control and high-speed X-ray modulation, an intensity of an X-ray to be generated by the anode;
- and
- a control circuit configured to control the voltage generators to switch the intensity of the X-ray to be generated by the anode, and control the power generator to rotate the anode, and when a value substantially equal to an integer multiple of a switching period of the intensity of the X-ray coincides with a rotation period of the anode, the control circuit is configured to control the power generator to shift at least some thermoelectron collision ranges of the anode in a first turn of the anode from thermoelectron collision ranges in a second turn of the anode.
A radiological image diagnostic apparatus, comprising:
- a cathode configured to generate a thermoelectron;
- an anode configured to generate an X-ray upon receiving the thermoelectron generated by the cathode;
- a support mechanism configured to support the anode to be rotatable about a rotation axis;
- a power generator configured to supply power to the support mechanism;
- voltage generators configured to switch, by high-speed X-ray ON/OFF control and high-speed X-ray modulation, an intensity of an X-ray to be generated by the anode;
- and
- a control circuit configured to control the voltage generators to switch the intensity of the X-ray to be generated by the anode, and control the power generator to rotate the anode, and when a value substantially equal to an integer multiple of a switching period of the intensity of the X-ray coincides with a rotation period of the anode, the control circuit is configured to control the power generator to shift at least some thermoelectron collision ranges of the anode in a first turn of the anode from thermoelectron collision ranges in a second turn of the anode.
Dependencies are inferred from the claim text.