62results about "X-ray tubes" patented technology

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.

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.

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.

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

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.

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.

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.

To provide a simple focal spot size measuring method satisfying requirements of the fifth edition of IEC 60336 by using a two-dimensional digital X-ray sensor and reducing the number of data used for noise reduction.SOLUTION: An X-ray tube focal spot size measuring device comprises a power supply unit for driving an X-ray tube, the X-ray tube, the source of X-rays, a slit camera with a continuously uniform slit width, and a two-dimensional digital X-ray sensor. An X-ray tube focal spot size measuring method measures a focal spot size of the X-ray tube by the steps of: averaging signals having a line spread function corresponding to intensities of X-rays of a plurality of lines different in the longitudinal direction of the slit by using the X-ray tube focal spot size measuring device to calculate an averaged signal; and calculating the focal spot size on the basis of the width of two points having a prescribed ratio to a maximum value of an averaged signal having the line spread function.SELECTED DRAWING: Figure 17

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

The X-ray source is configured to generate X-rays (11) by means of electron collisions with the anode (2), and comprises an electron beam generator (5) for generating an electron beam (3) of electrons guided along the beam axis. The rotating anode assembly (1) comprises a pivot (17) and an anode surface portion (2) mounted on the pivot for receiving electrons in the electron beam for generating X-rays. The suspension assembly (19) is configured to apply a restoring force to the rotating anode assembly to bias the rotating anode assembly towards a stationary position in which the anode surface portion is stationary relative to the pivot. The displacer assembly (21) is configured to apply a periodic displacement force to the rotating anode assembly to displace the rotating anode assembly from the stationary position. The position of the anode assembly oscillates about the stationary position with a lateral movement relative to the beam axis in response to the periodic displacement force and the restoring force, thereby causing the anode surface portion to oscillate laterally across the beam axis.

The utility model discloses a jig for high-voltage ignition detection of an X-ray bulb tube. The jig comprises a stainless steel tank and an observation window covering the upper part of the stainless steel tank, a high-voltage wire connecting hole is formed in one end of the stainless steel groove, a high-voltage wire extending pipe extending towards the interior of the stainless steel groove is arranged in the high-voltage wire connecting hole, and the tail end of the high-voltage wire extending pipe is connected with a bulb tube quick plug connector used for being connected with an X-ray bulb tube through a high-voltage wire connector; a lamp wire connecting hole is formed in the other end of the stainless steel groove, and a lamp wire connector is arranged in the lamp wire connecting hole. According to the utility model, the creepage phenomenon and the radiation leakage phenomenon possibly occurring in the traditional measure are avoided, a guarantee can be provided for the fixation of the X-ray bulb tube, and compared with the traditional design that the bulb tube is directly suspended in oil liquid, accidental ignition caused by non-bulb tube faults is not easy to cause, and meanwhile, the fixing method is simple and the bulb tube is convenient to replace; in addition, due to the design of the oil outlet in the bottom, the problem of oil discharge can be solved under the condition of ensuring sealing and radiation protection.

The invention discloses an X-ray beam preparation method and a detector calibration method. The X-ray beam preparation method comprises the following steps: 1) selecting an X-ray light tube of a corresponding target material according to the scale requirement of a detector; (2) preparing a multi-layer film element according to the energy of the selected X-ray light tube, wherein the multi-layer film element is used for diffracting X-rays output by the X-ray light tube; 3) placing the multilayer film element at a position which is a set distance away from the selected X-ray light tube, and adjusting the posture of the multilayer film element, so that the multilayer film element diffracts the X-rays output by the selected X-ray light tube; 4) moving the multilayer film element back and forth along the light beam direction, and determining the position with the largest diffraction spot and the strongest central spot as the final position of the multilayer film element; and 5) adjusting the roll angle and the swing angle of the multilayer film element, and taking the X-ray when the diffraction spot is strongest and maximum as the X-ray for detector scale calibration. The prepared X-ray beam is used for calibrating the detector, and the problems of scale and calibration of the advanced detector are solved.

The invention refers to a heat exchanger that can be used to heat liquids as well as in other areas of thermoenergetics, using electric heat sources. The heat exchanger, according to the invention, consists of: metal body, equipped with channels A, B, C, D, E, F. The liquid supply takes place through the supply connection mounted in channel A. In channel B and C, thermal jackets are mounted, and in technological holes - are mounted plugs. The electric heaters, which are supplied with electricity through contacts, are mounted in a hole and in the thermal jackets. The evacuation of the heated liquid takes place through channel F, in which the exhaust connection is mounted. Channel D ensures the movement of liquid from channel A to channel B, and channel E ensures the movement of liquid from channel B to channel C. The plug, closes from the outside the technological holes, as they were formed due to the technological process of execution of channel D and E.

The present invention relates to a method for controlling an X-ray tube (12), the X-ray tube having at least one grid electrode (18) arranged between an anode electrode (14) and a cathode electrode (16), wherein an electron flow (26) from the cathode electrode (16) to the anode electrode (14) is focused by means of a focusing unit (24), and the at least one grid electrode (18) is loaded in a first switching state with a first grid potential for clamping off the electron flow (26) between the anode electrode (14) and the cathode electrode (16) and in a second switching state with a second grid potential for releasing the electron flow (26). According to the invention, the second grid potential is provided at least by the focusing unit (24).

A cathode of an electron emission device is disclosed, the cathode including carbon nanotubes (CNTs), a nanofiller material, and a carbonizable polymer, and the cathode exhibits increased hardness and is formed by a high-temperature heat treatment and is substrate-free. Also provided is a method of forming the cathode of an electron emission device, the method comprising: a) forming a dispersion mixture including the carbon nanotubes, the nanofiller material, and the 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) exposing the dried mixture to a high-temperature heat treatment, the method resulting in a cathode of an electron emission device with increased hardness.

An intelligent power system and method of protecting an X-ray tube of a CT imaging system during a power failure includes monitoring a remaining amount of power from a backup power supply, the backup power supply being supplied by a UPS coupled to a PDU providing power to the CT imaging system. The X-ray tube has a liquid metal bearing rotation assembly. The system and method automatically formulate a strategy and determine where to supply the backup power remainder to prevent thermal landing of the X-ray tube liquid metal bearing rotating assembly.

An X-ray tube 12 is provided. The X-ray tube 12 includes an electron beam source including a cathode 62 configured to emit an electron beam 70. The X-ray tube 12 also includes an anode assembly including an anode 66 configured to receive the electron beam and to emit X-rays when impacted by the electron beam. The X-ray tube 12 further includes a gridding electrode 58 disposed about a path of the electron beam between the electron beam source and the anode assembly. The gridding electrode, when powered at a specific level, is configured to grid the electron beam in synchronization with planned transitions during a dynamic focal spot mode.

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.