104results about "X-ray tubes" patented technology

To provide a vacuum pipe support structure in which a temperature in an inner part is hardly increased.SOLUTION: A vacuum pipe support structure includes: a vacuum pipe; a cover that covers the vacuum pipe; and a support member that supports the vacuum pipe and the cover. The cover includes: a fluid introduction part that passes the cover in order to introduce a fluid into the cover; and a fluid exhaust part that passes the cover in order to exhaust the fluid from the cover. The fluid introduced from the fluid introduction part comes into contact with the vacuum pipe and is exhausted via the fluid exhaust part.SELECTED DRAWING: Figure 3

A ray generating device and a control method thereof are provided. The ray generating device includes: an electronic beam generating device; a microwave generating device; a microwave circulator, having a power input port and at least two power output ports, the power input port being connected to the microwave generating device; a plurality of accelerating tubes respectively connected to at least two power output ports, configured to respectively receive a plurality of electronic beams, and accelerate electronic beams respectively through microwaves received from the at least two power output ports, and to respectively generate a plurality of rays having at least two different energies; and a controller, configured to perform chronological control on microwave power of the microwave generating device, and chronological control on beam loadings of the electronic beams generated by the electronic beam generating device and respectively corresponding to accelerating tubes.

A field emission assembly and an electromagnetic wave generator are provided, the field emission assembly includes a linear emitter which includes carbon nanotube (CNT) fibers and emits electrons and a holder configured to fix the emitter, both ends of the emitter are fixed to the holder, and the emitter includes at least one of a curved portion so as to form a peak in an electron emission direction and a bent portion so as to form a peak in the electron emission direction.

The present invention provides an X-ray imaging apparatus and X-ray tube that can reduce artifacts caused by a limited number of imaging angles while suppressing the increase in imaging time required to acquire projected image data. [Solution] This X-ray imaging apparatus 100 comprises an X-ray tube 1 including a first electron irradiation unit 10a and a second electron irradiation unit 10b, a detector 2, a subject placement unit 3, a rotation mechanism 4, and a control unit 21. The control unit 21 performs the following controls: for each of the multiple imaging angles 6, it controls the simultaneous irradiation of electrons from the first electron irradiation unit 10a and the second electron irradiation unit 10b; and it controls the first relative focal position 7a of the first electron irradiation unit 10a at the first imaging angle 6a, the second relative focal position 7b of the second electron irradiation unit 10b at the first imaging angle 6a, the third relative focal position 7d of the first electron irradiation unit 10a at the second imaging angle 6b, and the fourth relative focal position 7e of the second electron irradiation unit 10b at the second imaging angle 6b, so as not to overlap with each other.

The invention relates to a method for controlling the temperature of an X-ray device, comprising: - Acquiring planning information comprising at least one operating parameter of at least one component of the X-ray device for a planned operation of the X-ray device, - identifying a planning temperature of the at least one component of the X-ray device based on the at least one operating parameter, - Operating the X-ray machine according to the planning information, wherein a temperature control unit of the X-ray device is controlled before and / or during operation of the X-ray device based on the planning temperature such that the temperature control unit tempers the at least one component of the X-ray device to a predefined temperature or a predefined temperature range by providing a heating and / or cooling power. The invention further relates to an X-ray device and a computer program product.

A device for concentrating ionizing radiation fluence is disclosed having a coupling structure linking the external radiotherapy device with linear accelerator to an external structure, whose central axis is hollow with an input window through which electrons enter attaching to the rotation device; a rotation system linking the coupling structure with a coupling flange rotating an inner structure; a deflection system in the inner structure, wherein the deflection system has first and second magnetic deflection devices; a system for controlling the focal point, which is in the electron deflection system, having an electronic control system controlling a set of motors that produce coordinated movements of the second magnetic deflection device, a correction element and a collimator, which change the position of the focal point; and at least two laser diodes on the edge of the collimator pointing towards the focal point determining the position of the electron beam generated.

A charged particle source for use in x-ray applications, the charged particle source includes (a) a source electrode having an emission surface, the source electrode is configured to emit charged particles of a first polarity towards an extraction element to form a charged particle beam; and (b) an aperture lens that comprises an aperture that is concentric to the source electrode and is configured, due to a bias difference of a second polarity between the source electrode and the aperture lens, to limit an area of the source electrode from which the charged particle beam emanates, the second polarity is opposite to the first polarity.

A system and method of texturing a surface of an X-ray tube component, which comprises applying laser radiation to the surface of the X-ray component to remove material from the surface of the X-ray tube component by producing a pattern of varying structures on the surface of the X-ray tube component to improve the emissivity of the X-ray tube component.

The present invention relates to a radiation generating device and a control method thereof, the radiation generating device comprising: an electron beam generating device (2) configured to generate a plurality of electron beams; a microwave generating device (4) configured to generate microwaves; a microwave circulator (5) having a power input port and at least two power output ports, the power input port being connected to the microwave generating device (4); a plurality of acceleration tubes connected to the electron beam generating device and each connected to the at least two power output ports, configured to receive a plurality of electron beams respectively and accelerate the plurality of electron beams via microwaves received from the at least two power output ports to generate a plurality of radiations having at least two different energies respectively; and a controller (1) configured to perform time-series control of microwave power of the microwave generating device (4) and time-series control of beam loads of electron beams generated by the electron beam generating device (2) and corresponding to each of the plurality of acceleration tubes (3).

In a method for regulating a position of an X-ray focus on the anode of an X-ray source of a scan unit of an X-ray imaging system, a combined actual position of the X-ray focus is determined by a combination of a measured position of the X-ray focus and a model-based position of the X-ray focus, which is determined based on a measured value of a deflection current. On the basis of the combined actual position and a target position, a manipulated variable is determined. On the basis of the determined manipulated variable, a regulation is performed to correct a deviation of the position of the X-ray focus from the target position.

The invention relates to the technical field of bulb tube production, and discloses a tube core adjusting device and an adjusting method.The tube core adjusting device comprises a mounting ring, at least three measuring assemblies and an air bag assembly, the mounting ring is arranged on a tube sleeve, and the at least three measuring assemblies are evenly arranged on the mounting ring at intervals in the circumferential direction of the mounting ring; a distance measuring sensor of the measuring assembly can be located in the containing cavity and face the pipe core, and the distance measuring sensor is used for measuring the real-time distance between the outer wall of the pipe core and the inner wall of the pipe sleeve in the extending direction of the distance measuring sensor. The at least three groups of airbag assemblies are uniformly arranged on the mounting ring at intervals in the circumferential direction of the mounting ring, and one group of airbag assembly is in signal connection with one measuring assembly. An air bag body of the air bag assembly is located between the outer wall of the pipe core and the inner wall of the pipe sleeve, and the inflation amount of the air bag body is adjusted according to the real-time distance measured by the measuring assembly, so that the difference value between the real-time distance between the outer wall of the pipe core and the inner wall of the pipe sleeve and the standard distance is within a preset error interval in the extending direction of the distance measuring sensor.

The present invention relates to the technical field of tube production, and discloses a tube core adjustment device and an adjustment method. The tube core adjustment device comprises a mounting ring, a measuring assembly and an airbag assembly. The mounting ring is arranged on a tube sleeve, and at least three measuring assemblies are evenly spaced on the mounting ring along the circumference of the mounting ring. The distance measuring sensor of the measuring assembly can be located in the accommodating cavity and facing the tube core. The distance measuring sensor is used to measure the real-time distance between the outer wall of the tube core and the inner wall of the tube sleeve in the extension direction of the distance measuring sensor. At least three groups of airbag assemblies are evenly spaced on the mounting ring along the circumference of the mounting ring, and one group of airbag assemblies is connected to a measuring assembly signal. The airbag body of the airbag assembly is located between the outer wall of the tube core and the inner wall of the tube sleeve, and the inflation amount of the airbag body is adjusted according to the real-time distance measured by the measuring assembly, so that in the extension direction of the distance measuring sensor, the difference between the real-time distance between the outer wall of the tube core and the inner wall of the tube sleeve and the standard distance is within a predetermined error range.

Systems / techniques are provided that facilitate intelligent intervention distribution for a medical imaging scanner. In various embodiments, a system may access a set of medical imaging interventions (e.g., 106) to be performed on multiple medical imaging scanners (e.g., 104). In various aspects, the system may determine a recommended assignment (e.g., 404) based on a plurality of digital scanner twins (e.g., 402) each including one or more cathode filament wear models (e.g., 402 (1) (1), 402 (1) (m), 402 (n) (1), 402 (n) (m)) for a respective one of the plurality of medical imaging scanners, the recommended assignment indicates how to assign the set of medical imaging interventions among the plurality of medical imaging scanners. In various examples, the system may assign the set of medical imaging interventions among the plurality of medical imaging scanners according to the recommended assignment.

The electron gun device is heated to a high temperature in a vacuum to emit electron beams. The surface of the material (108, 125) emitting electron beams is a hydride metal that melts into a liquid when working at a high temperature. The liquid hydride metal is contained in a hollow jacket container (102, 124) that is solid when working at a high temperature as a hydride liquid metal or an unhydride liquid metal. The hydride metal is heated to a high temperature together with the jacket container (102, 124). The hydride liquid metal is exposed from the jacket container (102, 124), forming a liquid surface where gravity, an electric field, and a surface tension of the liquid surface are mutually balanced, and electron beams are emitted from the exposed hydride liquid metal surface.

An X-ray generating apparatus includes an X-ray generating tube including an electron gun and a target configured to generate X-rays upon receiving an electron beam emitted from the electron gun, a deflector configured to deflect the electron beam, a driving circuit configured to apply an accelerating voltage between a cathode of the electron gun and the target, and an adjuster configured to adjust deflection of the electron beam by the deflector in accordance with the accelerating voltage or an amount of change in the accelerating voltage so as to reduce a change in incident position of the electron beam onto the target due to a change in the accelerating voltage.

An X-ray generating apparatus includes an X-ray generating tube including an electron gun and a target configured to generate X-rays upon receiving an electron beam emitted from the electron gun, a deflector configured to deflect the electron beam, a driving circuit configured to apply an accelerating voltage between a cathode of the electron gun and the target, and an adjuster configured to adjust deflection of the electron beam by the deflector in accordance with the accelerating voltage or an amount of change in the accelerating voltage so as to reduce a change in incident position of the electron beam onto the target due to a change in the accelerating voltage.

An x-ray FLASH radiotherapy device uses an electron beam to generate x-rays on a target element. The focal area on the target element is about 1 to about 12 cm2. The target element is separated from a radiotherapy patient by a thin aerogel insulator. Using about 50 to 200 kV of power, the x-ray FLASH radiotherapy device administers 40 Gy / s of radiation or more during short bursts or pulses of one second or less. Due to the short duration of these pulses, heating of the target element is limited, thereby reducing the source to surface distance between the radiation source and the patient.

Various methods and systems are provided for a liquid metal bearing assembly (300). In one embodiment, a liquid metal bearing assembly includes a fill port (310) fluidly coupled to a liquid metal reservoir (312) of the liquid metal bearing assembly, the fill port comprising an inlet diameter and an outlet diameter, the outlet diameter smaller than the inlet diameter, and a pin formed to fit inside the fill port and prevent liquid metal from leaving the liquid metal reservoir via the fill port.

This inspection device for inspecting an object to be inspected comprises: an X-ray generation tube that has a target having an X-ray generation unit for generating an X-ray upon being irradiated with an electron beam and that radiates an X-ray towards the object to be inspected; and a plurality of X-ray detectors. Each of the plurality of X-ray detectors detects an X-ray that has been: radiated from foreign matter present on an inspected surface of the object to be to inspected irradiated with the X-ray from the X-ray generation unit; and totally reflected by the inspected surface.

Method for detecting high-voltage flashovers in an X-ray device (2) comprising an X-ray source (6) and a high-voltage supply (4), wherein the X-ray source (6) comprises an X-ray tube (10) and the high-voltage supply (4) comprises a high-voltage generator (7) and at least one cable (14), wherein the at least one cable (14) is at least part of a connecting path (VS) between the high-voltage generator (7) and the X-ray tube (10), characterized in that during normal operation of the X-ray device (2), a disturbance pulse (I) is detected and evaluated, which occurs due to the high-voltage flashover in the connecting path (VS), and that different flashover classes are determined based on the evaluated disturbance pulse (I), in particular on - Breakovers in the vacuum of the X-ray tube (10) - Flashovers in an insulating material - Partial discharges.

To provide a smart power system and method to protect an X-ray tube of a CT imaging system during a power outage.SOLUTION: The system and method comprise monitoring a remaining amount of power from a backup power source supplied by a UPS coupled to a PDU that is providing power to the CT imaging system. The X-ray tube has a liquid metal bearing rotating assembly. The system and method automatically strategize and determine where to supply the remaining amount of backup power in order to prevent a hot shutdown of the X-ray tube liquid metal bearing rotating assembly.SELECTED DRAWING: Figure 4

Liquid metal bearing assemblies and methods for operation of said assemblies are provided. One example liquid metal bearing assembly (300) includes a channel (314) fluidly coupling a liquid metal reservoir (312) to a gap (316) between a sleeve (302) and a shaft (304), and the channel comprising a first section (314a) sloped at a first angle and a second section (314b) sloped at a second angle, wherein the first angle is different from the second angle, and a curved transition section (458) is positioned between the first section and the second section.

To increase the quality of computed tomography (CT) images generated by a CT system by altering a shape of a focal spot of an X-ray emitter of the CT system.SOLUTION: A method comprises: controlling (904, 914) a CT system to focus a beam of electrons generated by a cathode of the CT system on a plurality of focal spots on a surface of a target of the CT system; generating a composite focal spot from the plurality of focal spots; and obtaining (920) projection data of the CT system with the composite focal spot. For example, two focuses may be combined to generate the composite focus. By combining the focal spots to generate the composite focal spots, the quality of view is increased.SELECTED DRAWING: Figure 9

A method for evaluating the performance of an X-ray tube, characterized in that the method comprises: Recording arcing events that occurred during use of the X-ray tube; Classifying arc flash events by severity; Generating, based on the classified arc events, a first growth pattern for the occurrence of arc events; and Determining a level of bubbles in the x-ray tube by finding, based on the first growth pattern, a plurality of matching second growth patterns associated with known levels of bubbles in the x-ray tube.

An X-ray imaging system using multiple pulsed X-ray sources to perform highly efficient and ultrafast 3D radiography is presented. There are multiple pulsed X-ray sources mounted on a structure in motion to form an array of sources. The multiple X-ray sources move simultaneously relative to an object on a pre-defined arc track at a constant speed as a group. Electron beam inside each individual X-ray tube is deflected by magnetic or electrical field to move focal spot a small distance. When focal spot of an X-ray tube beam has a speed that is equal to group speed but with opposite moving direction, the X-ray source and X-ray flat panel detector are activated through an external exposure control unit so that source tube stay momentarily standstill equivalently. 3D scan can cover much wider sweep angle in much shorter time and image analysis can also be done in real-time.

This inspection dvice for inspecting a surface to be inspected that is disposed on an inspection surface comprises an X-ray generation tube having a target including an X-ray generation unit for generating X-rays due to being irradiated with an electron beam, the X-ray generation tube emitting X-rays toward the inspection surface; and an X-ray detector for detecting X-rays that are emitted from foreign matter present on the surface to be inspected, which is irradiated with the X-rays from the X-ray generation unit, and that are totally reflected by the surface to be inspected, the X-ray detector having a long X-ray capture unit.

An X-ray apparatus for the analysis of nonferrous metals includes an X-ray source (1) that produces a low-energy radiation beam and an X-ray spectrometer (4), these components being arranged close enough to each other and to a sample (2) to be analyzed to be able to simultaneously perform both fluorescence and Compton backscattering analysis using both phenomena to identify both metallic and nonmetallic light materials, particularly for the separation of aluminum and magnesium light alloys.

A method at an X-ray source is disclosed, the X-ray source comprising an electron source for providing an electron beam and a target comprising a first working region for generating X-ray radiation upon interaction with the electron beam. The method comprises determining a first quantity indicative of a current absorbed by the target at the first working region, and in response to the first quantity deviating from an expected value moving the electron beam from the first working region to a reference region, determining a second quantity indicative of a current absorbed at the reference region, and determining an operational state of the X-ray source based on the first quantity and the second quantity, wherein the operational state is an electron beam fault state or a target fault state.

The present invention relates to the field of CT tube core exhaust technology, and in particular to an exhaust device and exhaust process for a CT tube core with a full metal shell. The exhaust device of the present invention comprises a tube core exhaust platform, a sealing bottom plate is provided on the tube core exhaust platform, a support structure is provided on the sealing bottom plate, a CT tube core with a full metal shell is fixed horizontally on the support structure, and a vacuum exhaust pipeline assembly is connected to the exhaust port of the CT tube core with a full metal shell; an oven is provided directly above the sealing bottom plate, and the oven and the sealing bottom plate can be in sealed contact. The exhaust process of the present invention comprises the steps of tube installation, vacuum baking degassing, and high-pressure target practice degassing. The present invention can achieve efficient exhaust of the CT tube core with a full metal shell liquid metal bearing. During the exhaust process, the gas adsorbed in the tube is fully released and promptly extracted from the tube by vacuum heating and high-pressure target practice.