26results about "X-ray tubes" patented technology

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.

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.

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.

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.

The invention relates to a method for operating a computed tomography device (150), wherein the computed tomography device (150) comprises at least one x-ray radiation source (131) configured for generating x-ray radiation cones (132) for irradiating an object (134), wherein the computed tomography device (150) comprises at least one detector (136) configured for detecting the x-ray radiation of the x-ray radiation cones (132) that have interacted with the object (134), wherein the x-ray radiation source (131) comprises at least one electron optic arrangement (138) configured for variably arranging at least one electron beam (140) onto a plurality of positions of focal spots on at least one target comprised by the x-ray radiation source (131) in a manner that a plurality of different x-ray radiation cones (132) emerging from the focal spots is generated in order to image different portions of the object (134); the method comprising:performing a projection image scanning sequence (PSS) by using an imaging focal spot pattern in order to generate a plurality of projection images, wherein the imaging focal spot pattern comprises a plurality of x-ray focal spot positions on the at least one target (144) such that a volume of the object (134) to be reconstructed is irradiated by the different x-ray radiation cones (132);performing a tomographic scanning sequence (TSS) by performing the projection image scanning sequence (PSS) at differing viewing angles;performing an image reconstruction algorithm using the projection images in order to reconstruct a 3D-image of the object (134).The invention further relates to a computed tomography device (150), a computer program and a computer-readable storage medium. The invention may be employed in order to extend the field of view for a specific viewing angle.

Indolo[3.2.1-jk]carbazole-6-carbonitrile derivatives of the formula (I) as blue fluorescent emitters in organic electroluminescent devices, more particularly OLEDs.

An inspection apparatus for inspecting an inspection target surface arranged on an inspection plane, includes an X-ray generation tube having a target including an X-ray generation portion that generates X-rays by irradiation with an electron beam, and configured to emit X-rays to the inspection plane; and an X-ray detector configured to detect X-rays emitted from a foreign substance existing on the inspection target surface irradiated with the X-rays from the X-ray generation portion and totally reflected by the inspection target surface. The X-ray detector has an energy resolution not less than 1 keV or the X-ray detector has no energy analysis function.

Some embodiments include an apparatus, comprising: a partition; a feedthrough penetrating the partition and hermetically sealed to the partition, the feedthrough having a major axis; a first wall extending from the partition in a first direction along the major axis; and a second wall extending from the partition in a second direction opposite to the first direction along the major axis, the second wall forming a connector interface with the feedthrough; wherein a ratio of a length of the first wall to a thickness of the first wall is greater than or equal to 3:1.

The present disclosure relates to a ray generating apparatus and a control method thereof, the ray generating apparatus comprising: an electron beam generating device (2) configured to generate a plurality of electron beams; a microwave generating device (4) configured to generate microwaves; the microwave circulator (5) is provided with a power input port and at least two power output ports, and the power input port is connected with the microwave generating device (4); the plurality of accelerating tubes (3) are connected with the electron beam generating device (2), are respectively connected with the at least two power output ports and are configured to respectively receive the plurality of electron beams and respectively accelerate the plurality of electron beams through the microwaves received from the at least two power output ports so as to respectively generate a plurality of rays with at least two different energies; and the controller (1) is configured to perform sequential control on the microwave power of the microwave generation device (4) and perform sequential control on beam loads of electron beams which are generated by the electron beam generation device (2) and respectively correspond to the plurality of accelerating tubes (3).

An inspection apparatus for inspecting an inspection target surface arranged on an inspection plane, includes an X-ray generation tube having a target including an X-ray generation portion that generates X-rays by irradiation with an electron beam, and configured to emit X-rays to the inspection plane; and an X-ray detector configured to detect X-rays emitted from a foreign substance existing on the inspection target surface irradiated with the X-rays from the X-ray generation portion and totally reflected by the inspection target surface.

The invention provides an X-ray imaging device and an X-ray tube. This X-ray imaging device is provided with an X-ray tube and a control unit, and the control unit performs control such that electrons are simultaneously irradiated from a first electron irradiation unit and a second electron irradiation unit for each of a plurality of imaging angles; and setting a first relative focal position of the first electron irradiation unit at the first imaging angle, a second relative focal position of the second electron irradiation unit at the first imaging angle, and a third relative focal position of the first electron irradiation unit at the second imaging angle, and the fourth relative focal positions of the second electron irradiation unit at the second imaging angle differ so as not to overlap each other.

An adjustable collimator device for collimating a beam of energy emitted from a radiation source is disclosed. The collimator has an elongated plate-like body with a front-end and a rear- end. The collimator has a first set of emission apertures equally spaced around a central axis of the body that defines a zero-degree position. The first set of emission apertures are placed on the rear-end of the body and are configured to receive and sample a beam of energy entering the adjustable collimator device. A second set of apertures are placed proximate the front-end of the body. The second set of apertures are adjustable such that a first of the second set of apertures can be configured to have a first angular offset relative to the zero-axis and a second of the second set of apertures can be configured to have a second angular offset relative to the zero-axis.

An inspection apparatus for inspecting an inspection target object, includes an X-ray generation tube having a target including an X-ray generation portion that generates X-rays by irradiation with an electron beam, and configured to emit X-rays to the inspection target object, and a plurality of X-ray detectors, wherein each of the plurality of X-ray detectors detects X-rays emitted from a foreign substance existing on an inspection target surface of the inspection target object irradiated with the X-rays from the X-ray generation portion and totally reflected by the inspection target surface.

An inspection apparatus for inspecting an inspection target surface arranged on an inspection plane, includes an X-ray generation tube having a target including an X-ray generation portion that generates X-rays by irradiation with an electron beam, and configured to emit X-rays to the inspection plane, and an X-ray detector configured to detect X-rays emitted from a foreign substance existing on the inspection target surface irradiated with the X-rays from the X-ray generation portion and totally reflected by the inspection target surface. The X-ray detector includes a long X-ray receiver.

A compact phase and dark-field laboratory x-ray imaging system and method that utilizes partially coherent x-ray beams generated by a microfocus x-ray source with small focal spot size. A spatial beam modulator such as a random phase object, e.g., silicon carbide sandpaper, is placed between the source and the sample to create a random granular speckle pattern. The system employs a high-resolution detection setup with thin scintillators and a spatially resolving detector with small pixel size to capture the shifts in the speckle pattern caused by sample refraction effects. By analyzing these shifts, the system calculates the phase gradient and integrates it to produce a detailed phase image, enhancing the contrast of low atomic number materials such as soft tissue and polymers. The compact design shortens the source-to-detector distance, improves flux efficiency and system throughput, while enabling high-resolution three-dimensional tomographic imaging.

An 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, wherein the control unit 21 performs a control to cause electrons to be irradiated simultaneously from the first electron irradiation unit 10a and the second electron irradiation unit 10b for each of a plurality of imaging angles 6, and a control to make a first relative focal position 7a of the first electron irradiation unit 10a at a first imaging angle 6a, a second relative focal position 7b of the second electron irradiation unit 10b at the first imaging angle 6a, a third relative focal position 7d of the first electron irradiation unit 10a at a second imaging angle 6b, and a fourth relative focal position 7e of the second electron irradiation unit 10b at the second imaging angle 6b different from each other so as not to overlap.

The invention relates to a method for operating a computed tomography apparatus, the computed tomography apparatus comprising at least one X-ray radiation source, the computed tomography apparatus comprising at least one detector; the method comprises: performing a projection image scan sequence to generate a plurality of projection images by using an imaging focal spot pattern comprising a plurality of X-ray focal spot positions on at least one target such that a volume of an object to be reconstructed is illuminated by different X-ray radiation cones; performing a tomoscan sequence by performing the projection image scan sequence at different viewing angles; an image reconstruction algorithm is performed using the projection image to reconstruct a 3D image of the object. The invention also relates to a computed tomography device, a computer program product and a computer readable storage medium. The present invention can be employed to expand a field of view for a specific angle of view.

The invention provides an X-ray interference light beam implementation method and device. The method comprises the steps that a filtering film and a detector are sequentially arranged on an emergent light path of an X-ray machine; filtering membranes with different parameters are replaced, and an X-ray machine is driven to emit X-rays, so that a detector collects energy spectrum data corresponding to each filtering membrane within a preset time, a target filtering membrane is selected, and the filtering membranes are replaced in situ; after a target filtering membrane is arranged between the X-ray machine and the detector, determining a target pose of the X-ray machine; a light splitting crystal is arranged between a detector and a target filtering film, and the position and posture of the light splitting crystal and the position and posture of the detector are adjusted, so that the detector obtains the X-rays respectively when moving close to an initial position and moving away from the initial position, and a first beam of coherent light and a second beam of coherent light split by the light splitting crystal are obtained. By adopting the scheme, the light beam coherence can be improved, and the test efficiency is improved.

To provide a formulation and a process for fabricating carbon nanotube-based cathodes in a manner that does not require a support, can withstand high temperatures, and can maintain their physical integrity under mechanical stress while maintaining field emission performance.SOLUTION: A cathode for an electron-emitting device is disclosed, the cathode comprising carbon nanotubes (CNTs), a nano-filler material, and a carbonizable polymer, wherein the cathode exhibits increased hardness, is formed by a high temperature heat treatment, and is free of a substrate. There is further provided a method of forming a cathode of an electron emitting device, the method comprising: a) forming a dispersed mixture comprising carbon nanotubes, a nanofiller material, and a carbonizable polymer in a solvent; b) coating and / or extruding the mixture; c) drying the coated and / or extruded mixture to remove at least a substantial portion of the solvent; and d) subjecting the dried mixture to a high temperature heat treatment, the method resulting in a cathode of an electron emitting device having increased hardness.SELECTED DRAWING: None

An inspection apparatus for inspecting an inspection target object, includes an X-ray generation tube having a target including an X ray generation portion that generates X-rays by irradiation with an electron beam, and configured to emit X-rays to an inspection target surface of the inspection target object, an X-ray detector configured to detect X-rays emitted from a foreign substance existing on the inspection target surface irradiated with the X-rays from the X ray generation portion and totally reflected by the inspection target surface, and an adjustment mechanism configured to adjust a relative position between the inspection target surface and the X-ray detector.

The invention relates to a method for operating a computed tomography device (150), wherein the computed tomography device (150) comprises at least one x-ray radiation source (131) configured for generating x-ray radiation cones (132) for irradiating an object (134), wherein the computed tomography device (150) comprises at least one detector (136) configured for detecting the x-ray radiation of the x-ray radiation cones (132) that have interacted with the object (134), wherein the x-ray radiation source (131) comprises at least one electron optic arrangement (138) configured for variably arranging at least one electron beam (140) onto a plurality of positions of focal spots on at least one target comprised by the x-ray radiation source (131) in a manner that a plurality of different x-ray radiation cones (132) emerging from the focal spots is generated in order to image different portions of the object (134); the method comprising: - performing a projection image scanning sequence (PSS) by using an imaging focal spot pattern in order to generate a plurality of projection images, wherein the imaging focal spot pattern comprises a plurality of x-ray focal spot positions on the at least one target (144) such that a volume of the object (134) to be reconstructed is irradiated by the different x-ray radiation cones (132); - performing a tomographic scanning sequence (TSS) by performing the projection image scanning sequence (PSS) at differing viewing angles; - performing an image reconstruction algorithm using the projection images in order to reconstruct a 3D-image of the object (134). The invention further relates to a computed tomography device (150), a computer program and a computer-readable storage medium. The invention may be employed in order to extend the field of view for a specific viewing angle.

An optical modulation electron source modulates the emission current of an electron beam emitted from a silicon-based field emitter using a photon beam source. The cathode of the field emitter includes a protrusion fabricated on a silicon substrate and having an emission tip covered by a coating. An extractor generates an electric field that attracts free electrons toward the emission tip for emission as part of the electron beam. The photon beam source generates a photon beam including photons having an energy greater than the energy band gap of silicon and includes optics that direct the photon beam onto the emission tip, where each absorbed photon generates a photoelectron that combines with the free electrons to enhance the emission current of the electron beam. A controller modulates the emission current by controlling the intensity of the photon beam applied to the emission tip. A monitor measures the electron beam and provides feedback to the controller.

The oil injection structure comprises a connecting part, a clamping part, an extrusion spring and a dismounting tool, the connecting part comprises a first connecting part and a second connecting part which are used for being connected with an oil port of a protective shell, a first through hole is formed in the first connecting part, a second through hole is formed in the second connecting part, and the clamping part is connected with the first connecting part and the second connecting part. One end of the extrusion spring is arranged in the first through hole, one end of the movable part is connected with the other end of the extrusion spring, the movable part comprises an oil injection part located in the first through hole and a sealing part located in the second through hole, and the oil injection part is provided with a plurality of oil injection holes; the disassembling tool comprises an oil pipe inserting and pulling part detachably connected with the oil pipe and an oil pipe connecting piece communicated with the inserting and pulling part, wherein the oil pipe connecting piece further comprises a rotating piece in threaded connection with the second connecting part. Through the mode, the oil injection structure disclosed by the utility model can prevent bubbles from being generated in a slow oil injection mode, and enables the oil pipe to be in quick plug-in connection, so that the oil injection is more convenient.