Radiography apparatus
AssigneeElectronics and Telecommunications Research Institute
InventorsJin-Woo Jeong, Yoon-Ho Song
Life of this patent
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Abstract
Provided herein is a radiography apparatus including an X-ray source configured to irradiate a subject radiation, and a sensing module configured to sense the radiation having passed through the subject, wherein the X-ray source includes a cathode electrode comprising an electric field emitting source configured to emit electrons, an anode electrode disposed opposite to the cathode electrode and configured to use the electrons to generate the radiation, and a current control unit connected to the cathode electrode to control an amount of the electrons.
Claims16
A radiography apparatus comprising:
- an X-ray source configured to irradiate a subject with radiation;
- and
- a sensing module configured to sense the radiation having passed through the subject,
- wherein the X-ray source comprises:
- a cathode electrode comprising an electric field emitting source configured to emit electrons;
- an anode electrode disposed opposite to the cathode electrode and configured to use the electrons to generate the radiation;
- and
- a current control unit connected to the cathode electrode to control an amount of the electrons,
- wherein the current control unit comprises:
- a switching transistor of which a first electrode is connected to the cathode electrode, a second electrode is connected to a ground power source, and a gate electrode receives a switching voltage;
- and
- a pull-up voltage source connected to the cathode electrode through a serially connected pull-up resistor to control an amount of the electrons.
A radiography apparatus comprising:
- a first X-ray source configured to irradiate a subject with first radiation;
- a second X-ray source separately disposed from the first X-ray source at a given interval to irradiate the subject with second radiation;
- a first sensing module configured to sense the first radiation having passed through the subject;
- and
- a second sensing module configured to sense the second radiation having passed through the subject,
- wherein each of the first X-ray source and the second X-ray source comprises:
- a cathode electrode comprising an electric field emitting source configured to emit electrons;
- an anode electrode disposed opposite to the cathode electrode and configured to accelerate the electrons;
- and
- a current control unit connected to the cathode electrode to control an amount of the electrons, and
- wherein the current control unit comprises:
- a switching transistor of which a first electrode is connected to the cathode electrode, a second electrode is connected to a ground power source, and a gate electrode receives a switching voltage;
- and
- a pull-up voltage source connected to the cathode electrode through a serially connected pull-up resistor to control an amount of the electrons.
A radiography apparatus comprising:
- a first X-ray source configured to irradiate a subject with first radiation;
- a second X-ray source separately disposed from the first X-ray source at a given interval to irradiate the subject with second radiation;
- and
- a sensing module configured to sense the first and second radiations having passed through the subject,
- wherein each of the first X-ray source and the second X-ray source comprises:
- a cathode electrode comprising an electric field emitting source configured to emit electrons;
- an anode electrode disposed opposite to the cathode electrode and configured to accelerate the electrons;
- and
- a current control unit connected to the cathode electrode and to control an amount of the electrons, and
- wherein the current control unit comprises:
- a switching transistor of which a first electrode is connected to the cathode electrode, a second electrode is connected to a ground power source, and a gate electrode receives a switching voltage;
- and
- a pull-up voltage source connected to the cathode electrode through a serially connected pull-up resistor to control an amount of the electrons.
Dependencies are inferred from the claim text.