96results about "X-ray tube structural circuit elements" patented technology

Embodiments of the present disclosure provide an X-ray tube. The X-ray tube may include a cathode assembly. The cathode assembly may include: a cathode configured to emit an electron beam; a cathode adjustment window disposed at a periphery of the cathode; and a controller configured to adjust emittance of the electron beams emitted from the cathode at different tube voltages by adjusting a potential difference between the cathode adjustment window and the cathode, so that a size of an electron beam spot formed by the electron beam matches a target focal point size.

X-ray generation apparatus includes X-ray generation tube, driving circuit, and accommodating container. The X-ray generation tube includes insulating tube with first and second opening ends, cathode closing the first opening end and having electron emitting portion, and anode closing the second opening end and having target. The accommodating container has third opening end, and the X-ray generation tube closes the third opening end. The accommodating container defines first space storing the driving circuit, and second space protruding from the first space and storing at least part of the X-ray generation tube. The accommodating container includes protrusion portion surrounding the second space, and one end of the second space forms the third opening end.

An X-ray generation apparatus includes an X-ray generation tube. The tube includes an insulating tube with a first opening end and a second opening end, a cathode arranged to close the first opening end of the insulating tube and including an electron emitting portion, and an anode arranged to close the second opening end and including a target that generates X-rays when electrons from the electron emitting portion collide; and an accommodating container configured to accommodate the X-ray generation tube, wherein the accommodating container has a third opening end, and the anode is arranged to close the third opening end, the accommodating container is filled with an insulating liquid to contact a part of the anode, and at least a part of an outer surface of the insulating tube is surrounded by a member so as to reduce abnormal discharge between the cathode and the anode via the insulating tube.

X-ray generation apparatus includes: X-ray generation tube, cathode having electron emitting portion, and anode having target; driving circuit for driving the X-ray generation tube, and accommodating container accommodating the X-ray generation tube and the driving circuit. The accommodating container defines first space storing the driving circuit, and second space protruding from the first space and storing at least part of the X-ray generation tube, the accommodating container includes protrusion portion surrounding the second space. The second space includes third space where X-rays from the target enter without being blocked by either the cathode or the anode, and fourth space where X-rays from the target are blocked by the cathode or the anode.

The invention provides a load balancing method of an X-ray tube and a load-balanced X-ray system.The load balancing method of the X-ray tube comprises the steps that cathode high voltage and anode high voltage which are related in polarity are provided for the X-ray tube, and a winding of a first transformer and a winding of a second transformer of a high-voltage generator are adjusted based on a target voltage difference value to be output; therefore, the difference value between the leakage inductance of the first transformer and the leakage inductance of the second transformer is changed to reach a target leakage inductance difference value, and the adjusted leakage inductance of the first transformer and the adjusted leakage inductance of the second transformer carry out corresponding voltage division on an anode high-voltage output loop and a cathode high-voltage output loop respectively. Therefore, the voltage difference value of the target anode high voltage and the target cathode high voltage of the adjusted X-ray tube reaches the target voltage difference value, the purpose of balancing the output voltage is achieved, an additional inverter circuit structure does not need to be added, the structures of the high voltage generator and the X-ray system are simplified, the design cost is reduced, and the method is suitable for large-scale popularization and application. And the system reliability is improved.

A method for reducing electron emission of an electron emitter comprises: emitting electrons from a first current path via at least one first field effect emitter element, subject to an emission voltage between a gate electrode and an emission surface; determining a property of the first current path; and activating a first current limiting unit subject to the properties of the first current path to reduce the electron emission of the electron emitter.

An X-ray generation apparatus includes: an X-ray generation tube including an insulating tube with a first opening end and a second opening end, a cathode arranged to close the first opening end of the insulating tube and including an electron emitting portion, and an anode arranged to close the second opening end and including a target that generates X-rays when electrons from the electron emitting portion collide; and an accommodating container configured to accommodate the X-ray generation tube, wherein the accommodating container has a third opening end, and the X-ray generation tube is arranged to close the third opening end, the accommodating container is filled with an insulating liquid, an outer surface of the cathode includes a cylindrical side surface and a circular bottom surface, and at least the entire side surface of the outer surface is surrounded by a member.

The invention provides a self-adaptive regulation and control method and device for suppressing high-voltage ignition of an X-ray tube, and relates to the technical field of suppression control, and the method comprises the steps: constructing a dual-SEPIC voltage regulation and control module connected with the input end of the X-ray tube; extracting high-voltage ignition characteristic data of the X-ray tube, and performing regulation and control target decomposition; and based on the dual-SEPIC voltage regulation and control module, adaptive regulation and deconstruction are carried out on the regulation and control target set to obtain a duty ratio adaptive regulation strategy, and the dual-SEPIC voltage regulation and control module carries out high-voltage sparking suppression on the X-ray tube according to the duty ratio adaptive regulation strategy. The technical problem that the suppression effect is unstable due to the fact that suppression control over high-voltage ignition of an X-ray light tube is unidirectional, the control precision of a single circuit is insufficient and a self-adaptive adjustment mechanism is lacked in the prior art is solved, double-SEPIC connection is adopted for mutual supervision of double-SEPIC output signals, and the suppression effect is stable. And the suppression effect of high-voltage ignition of the X-ray tube is improved.

X-ray generation apparatus includes X-ray generation tube having insulating tube with first and second opening ends, cathode closing the first opening end and having electron emitting portion, and anode closing the second opening end; electronic component arranged in proximity to the cathode; driving circuit for driving the X-ray generation tube via the electronic component; and accommodating container accommodating the X-ray generation tube, the electronic component, and the driving circuit. The accommodating container has third opening end, and the X-ray generation tube closes the third opening end. The accommodating container defines first space storing at least part of the driving circuit, and second space protruding from the first space and storing the X-ray generation tube and the electronic component.

X-ray generation apparatus includes X-ray generation tube having insulating tube, cathode, and anode having target for generating X-rays; driving circuit for driving the X-ray generation tube; and accommodating container accommodating the X-ray generation tube and the driving circuit. The accommodating container has opening end and the X-ray generation tube closes the opening end. The accommodating container is filled with insulating liquid. The accommodating container has first space storing the driving circuit, and second space protruding from the first space and storing the X-ray generation tube. The accommodating container includes protrusion portion surrounding the second space, and one end of the second space forms the opening end, the entire insulating tube is stored in the second space, and the protrusion portion is made of insulating material.

X-ray generation apparatus includes: X-ray generation tube having insulating tube with first and second opening ends, cathode closing the first opening end of the insulating tube and having electron emitting portion, and anode closing the second opening end and having target; and accommodating container accommodating the X-ray generation tube. The accommodating container has third opening end, and the X-ray generation tube closes the third opening end. The accommodating container is filled with insulating liquid, first member arranged spaced apart from the second opening end contacts at least part of outer surface of the insulating tube, and the first member is sandwiched between the insulating tube and second member arranged spaced apart from the accommodating container.

Disclosed herein are a method of controlling a bipolar high-voltage generator and an X-ray system. The bipolar high-voltage generator is connected to a load for supplying a cathode voltage and an anode voltage to the load. The bipolar high-voltage generator includes a first transformer and a second transformer. The first transformer is provided in an output circuit of the anode voltage, and the second transformer is provided in an output circuit of the cathode voltage. The method of controlling includes: obtaining a target voltage difference of the bipolar high-voltage generator, wherein the target voltage difference is within a preset range; and adjusting a working state of at least one of the first transformer and the second transformer based on the target voltage difference. The target voltage difference is defined as a difference between an absolute value of a target anode voltage and an absolute value of a target cathode voltage output from the bipolar high-voltage generator.

The invention provides a cold cathode flat plate X-ray source and a control method, and relates to the technical field of X-rays. In the application, the cold cathode flat plate X-ray source comprises an anode substrate and a cathode substrate; the anode target material is arranged on the anode substrate; the cathode assembly is arranged on the cathode substrate and comprises a plurality of cathode blocks which are distributed in an array mode, each cathode block comprises a plurality of nanowire cold cathodes which are distributed in an array mode, and in the X-ray output process, the nanowire cold cathodes are arranged on each cathode block. And if at least one row of nanowire cold cathodes currently used for emitting electrons in the cathode block are abnormal, determining at least one row of nanowire cold cathodes without abnormality in the cathode block, and controlling the nanowire cold cathodes to emit electrons to the anode target material so as to generate X-rays. Based on the above content, the problem of low utilization rate of the cold cathode flat plate X-ray source in the prior art can be improved.

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The present invention reduces the difference between the amount of X-rays when a high tube voltage is applied and the amount of X-rays when a low tube voltage is applied. An X-ray tube control system according to an embodiment includes a tube voltage control unit and a gate control unit. The tube voltage control unit alternately switches a tube voltage applied between a cathode that releases electrons and an anode that receives electrons from the cathode and generates X-rays between a first tube voltage and a second tube voltage higher than the first tube voltage. The gate control unit alternately switches a gate voltage applied between the cathode and a gate electrode that controls electrons from the cathode to the anode between a first gate voltage and a second gate voltage higher than the first gate voltage. The gate control unit performs control to drop the gate voltage to the first gate voltage and control to hold the gate voltage so that the tube current does not exceed an upper limit tube current based on the allowable power, the control being defined between a first transition period in which the tube voltage transitions from the second tube voltage to the first tube voltage and a first hold period in which the tube voltage is held to the first tube voltage.

In order to achieve effective cooling, an X-ray emitter with a tube housing having a vacuum is provided. At least one anode is arranged in the tube housing, such that the anode is irradiated by an electron beam generated in a cathode and accelerated through an electrical field. The anode is excited, such that an X-ray deceleration radiation is emitted. The X-ray emitter has a thermoelectric converter (e.g., at least one thermophotovoltaic cell) for generating electrical energy. The thermoelectric converter is arranged, such that the thermoelectric converter may be irradiated at least in part by a heat radiation emanating from the anode.

X-ray generation apparatus includes X-ray generation tube having insulating tube with first and second opening ends, cathode closing the first opening end and having electron emitting portion, and anode closing the second opening end; electronic component arranged in proximity to the cathode; driving circuit for driving the X-ray generation tube via the electronic component; and accommodating container accommodating the X-ray generation tube, the electronic component, and the driving circuit. The accommodating container has third opening end, and the X-ray generation tube closes the third opening end. The accommodating container defines first space storing at least part of the driving circuit, and second space protruding from the first space and storing the X-ray generation tube and the electronic component.

This X-ray generation device comprises an X-ray generation tube and an accommodation container. The X-ray generation tube includes: an insulating tube having a first open end and a second open end; a cathode that is positioned so as to block the first open end and includes an electron emission part; and an anode that is positioned so as to block the second open end and includes a target. The accommodation container has a first space for accommodating at least a portion of the X-ray generation tube and a second space for accommodating a drive circuit. The first space is positioned so as to protrude from the second space. The accommodation container has a third open end. The X-ray generation tube is positioned so as to block the third open end. An insulating liquid is filled into the accommodation container so as to contact a portion of the insulating tube. The insulating tube has a boundary surface constituting the outer surface of the X-ray generation tube. A first member positioned at a distance from the second opening end contacts at least a portion of the boundary surface. The first member is sandwiched between the insulating tube and a second member that is positioned at a distance from the accommodation container.

The invention discloses an electronic circuit and a method for providing a high tube voltage for an X-ray tube, a method for operating an X-ray tube, an X-ray tube system and a medical imaging apparatus. The invention relates to an electronic circuit for providing a high tube voltage for an X-ray tube. The electronic circuit has: a first inverter unit configured to receive an input DC voltage and convert it into a first AC voltage according to a first manipulated variable; and a second inverter unit configured to convert the input DC voltage to a second AC voltage according to a second manipulated variable. The further circuit portion is configured to generate a high tube voltage as a function of the first AC voltage and the second AC voltage. The control device is configured to determine a controlled variable and to vary the first manipulated variable (10) and / or the second manipulated variable as a function of the controlled variable, and to determine the controlled variable as a function of the first alternating current and the second alternating current and / or the first direct current and the second direct current.

A device and method for creating beam formed X-Ray radiation using radio frequency (RF) modulated field emission X-ray sources is described. A radio frequency RF source generates a RF control signal which is supplied to an array of phase delay elements to generate multiple individually controlled phase delayed RF signals. These are then directly provided to each of a plurality of field emission sources (via a matching circuit) to generate a plurality of RF modulated electron current, or beam, each at the same frequency and phase delay of the phase delayed RF signals. Each of the electron beams impacts a target anode to generate X-rays also at the same frequency and phase delay of the phase delayed RF signals. By controlling each of the phase delay elements a beamformed X-ray radiation pattern can be generated.

The X-ray generating device comprises an X-ray generating tube and an X-ray generating tube, the X-ray generating tube includes an insulating tube having a first open end and a second open end, a cathode arranged to close the first open end of the insulating tube and including an electron emission portion, and an anode arranged to close the second open end and including a target that generates X-rays when electrons from the electron emitting portion collide; and an accommodation container configured to accommodate the X-ray generating tube, in which the accommodation container has a third open end, and the X-ray generating tube is arranged to close the third open end, the accommodation container being filled with an insulating liquid such that the insulating liquid contacts a portion of the insulating tube, a first member disposed spaced apart from the second open end contacts at least a portion of an outer surface of the insulating tube, and the first member is sandwiched between the insulating tube and a second member disposed spaced apart from the accommodation container.

This X-ray generation device comprises an X-ray generation tube and an accommodation container. The X-ray generation tube includes: an insulating tube having a first open end and a second open end; a cathode that is positioned so as to block the first open end and includes an electron emission part; and an anode that is positioned so as to block the second open end and includes a target. The accommodation container has a first space for accommodating at least a portion of the X-ray generation tube and a second space for accommodating a drive circuit. The first space is positioned so as to protrude from the second space. The accommodation container has a third open end. The X-ray generation tube is positioned so as to block the third open end. An insulating liquid is filled into the accommodation container so as to contact a portion of the insulating tube. The insulating tube has a boundary surface constituting the outer surface of the X-ray generation tube. A first member positioned at a distance from the second opening end contacts at least a portion of the boundary surface. The first member is sandwiched between the insulating tube and a second member that is positioned at a distance from the accommodation container.

The present invention belongs to the technical field of X-ray equipment, and discloses an insulating ceramic, an X-ray tube and a method for testing secondary electrons. The insulating ceramic is installed on the X-ray tube, and the X-ray tube comprises a tube shell, a cathode assembly and an anode assembly. The anode assembly is rotatably penetrated at one end of the tube shell, and the cathode assembly is installed at the other end of the tube shell. The insulating ceramic comprises a ceramic body and a metal probe. The outer peripheral wall of the ceramic body comprises a conical surface, and the small end of the conical surface is sealed and connected to a supporting assembly of the anode assembly, and the large end of the ceramic body is sealed and connected to the tube shell. There are multiple metal probes, and the multiple metal probes are arranged at intervals in the circumferential direction around the ceramic body. Each metal probe is penetrated in the conical surface, and each metal probe is used to be connected to an external secondary electron detection device, and the other end of the metal probe is used to collect secondary electrons in the tube shell.

The X-ray generating apparatus includes: an X-ray generating tube, a cathode including an electron emission portion, and an anode including a target; a driving circuit configured to drive the X-ray generating tube, and an accommodating container configured to accommodate the X-ray generating tube and the driving circuit. The accommodating container defines a first space storing the driving circuit, and a second space protruding from the first space and storing at least a portion of the X-ray generating tube, the accommodating container including a protruding portion surrounding the second space. The second space includes a third space in which the X-rays from the target enter without being blocked by the cathode or the anode, and a fourth space in which the X-rays from the target are blocked by one of the cathode and the anode, in which the first insulating member is disposed spaced apart from the insulating tube and the accommodating container so as to surround the insulating tube, the first insulating member is not disposed in the third space.

An X-ray generating device (100) includes: an X-ray generating tube (1) including an insulating tube (10), a cathode (30) including an electron emission portion (32), and an anode (20) including a target (23) that generates X-rays when electrons from the electron emission portion (32) collide; a driving circuit (40) configured to drive the X-ray generating tube (1); and a housing container (50) configured to house the X-ray generating tube (1) and the driving circuit (40), in which the housing container (50) has an open end (OP3) and the X-ray generating tube (1) is arranged to close the open end (OP3), the housing container (50) is filled with an insulating liquid (60) such that the insulating liquid contacts the insulating tube (10), the housing container (50) has a first space (SP1) and a second space (SP2), and the first space (SP1) and the second space (SP2) are spaced apart from each other. The first space (SP1) stores the driving circuit (40), the second space (SP2) protrudes from the first space (SP1) and stores the X-ray generating tube (1), the housing container (50) includes a protruding portion (520) surrounding the second space (SP2), and one end of the second space (SP2) forms an open end (OP3), the entire insulating tube (10) is stored in the second space (SP2), and the protruding portion (520) is made of an insulating material.

To reduce the difference in X-ray dose between the application of a high tube voltage and the application of a low tube voltage.SOLUTION: An X-ray tube control system according to an embodiment includes a tube voltage control unit and a grid control unit. The tube voltage control unit alternately switches a tube voltage applied between a cathode that emits electrons and an anode that receives the electrons from the cathode to generate X-rays, between a first tube voltage and a second tube voltage higher than the first tube voltage. The grid control unit alternately switches a grid voltage applied between the cathode and a grid electrode that controls electrons traveling from the cathode toward the anode, between a first grid voltage and a second grid voltage higher than the first grid voltage. The grid control unit performs control to lower and hold the grid voltage at the first grid voltage only during a first transition period in which the tube voltage transitions from the second tube voltage to the first tube voltage and during a first holding period in which the tube voltage is held at the first tube voltage, so that the tube current does not exceed an upper limit tube current determined based on allowable power.SELECTED DRAWING: Figure 5

Some embodiments include an x-ray source, comprising: an anode; a field emitter configured to generate an electron beam; a first grid configured to control field emission from the field emitter; a second grid disposed between the first grid and the anode; a third grid disposed between the first grid and the anode; and a middle electrode disposed between the first grid and the anode wherein the second grid is either disposed between the first grid and middle electrode or between the middle electrode and the anode; wherein the third grid is a mesh grid.

According to one embodiment, an X-ray tube control system includes a tube voltage control circuitry and a grid control circuitry. The grid control circuitry performs control to decrease a grid voltage to a first (ex. low) grid voltage and control to hold the first grid voltage exclusively within a first transition period in which a tube voltage makes a transition from a second (ex. high) tube voltage to a first tube voltage and a first (ex. low) hold period in which a tube voltage is held at the first tube voltage so as to prevent a tube current from exceeding an upper limit tube current based on allowable power.

This X-ray generation device comprises an X-ray generation tube, a drive circuit, and a housing container. The X-ray generation tube includes: an insulation pipe having first and second open ends; a cathode closing the first open end of the insulation pipe and including an electron-emitting portion; and an anode closing the second open end and including a target with which electrons from the electron-emitting portion collide. The housing container has a third open end, which is closed by the X-ray generation tube. The housing container is filled with an insulating liquid. The housing container defines a first space in which the drive circuit is housed, and a second space that protrudes from the first space and in which at least a part of the X-ray generation tube is housed. The housing container includes a protruding portion surrounding the second space, one end of the second space constituting the third open end. A part of the outer surface of the insulation pipe is surrounded by an X-ray blocking member extending from the anode toward the cathode so as to block X-ray. The X-ray blocking member is covered by an insulation member.

The invention is entitled "C-arm imaging system and method". The invention discloses a system for imaging an object, comprising: an X-ray source operative to transmit X-rays through the object; and a detector to receive X-ray energy of the X-rays after passing through the object and generate corresponding object X-ray intensity. The system further comprises: a controller to measure a detector entrance dose without the object placed in the X-ray beam path and determine a relationship between X-ray tube electrical parameters and the detector entrance dose. The controller further determines a relationship between the X-ray tube electrical parameters, the detector entrance dose and the detector average pixel intensity and obtains a normalized air map as a function of the X-ray tube electrical parameters based on calibration image data. The controller also generates an air map based on the normalized air map, the detector entrance dose and the detector average pixel intensity and reconstructs an image of the object based on the air map and the measured object X-ray intensity.