40results about "X-ray tube multi-cathode assembly" patented technology

An X-ray source device includes an anode and an electron beam cathode system arranged to emit a plurality of electron beams therefrom toward the anode. A deflector device is disposed adjacent to the electron beam cathode system to manipulate interaction of one or more of the electron beams emitted by the electron beam cathode system with the anode. An associated method of forming an X-ray source device is also provided.

A system, comprising: a vacuum enclosure; an anode support structure penetrating the vacuum enclosure and including a plurality of first cooling passages; and an anode disposed within the vacuum enclosure, coupled to and supported by the anode support structure, and including: a target; and a plurality of second cooling passages; wherein: each of the second cooling passages is coupled to a corresponding first cooling passage; and the anode is coupled to the anode support structure on a side of the anode different from a side of the anode including the target and different from axial ends of the anode on a major axis of the anode

A system, comprising: a vacuum enclosure; an anode support structure penetrating the vacuum enclosure and including a plurality of first cooling passages; and an anode disposed within the vacuum enclosure, coupled to and supported by the anode support structure, and including: a target; and a plurality of second cooling passages; wherein: each of the second cooling passages is coupled to a corresponding first cooling passage; and the anode is coupled to the anode support structure on a side of the anode different from a side of the anode including the target and different from axial ends of the anode on a major axis of the anode

The present disclosure relates to a field emission device that generates X-rays by emitting an electron beam, and an X-ray generating apparatus using the same, including a semiconductor substrate; a bottom electrode disposed below the semiconductor substrate; an insulating layer disposed above the semiconductor substrate; a gate electrode disposed on the insulating layer; and, a top electrode disposed on the gate electrode; wherein the gate electrode is composed of a material satisfying at least one of a first condition for work function, a second condition for Gibbs free energy of a redox reaction with the insulating layer, a third condition for sublimation energy, and a fourth condition for electron mean free path.

An x-ray imaging apparatus 10 comprising a support 30 having two arms, wherein on one arm an x-ray emitter 50 is arranged, and on the other arm a flat panel digital detector 60 is arranged, the emitter and detector arranged opposite each other providing a space therebetween for the positioning of an object for x-ray imaging by the apparatus, the x-ray emitter comprising an array of emitters, the apparatus arranged such that in use different emitters are energisable independently from one another such that 3-dimensional tomosynthesis images are obtainable of the object, with the object, emitter and detector maintained stationary relative to one another.

The present invention relates to a high voltage connector (100) for selecting an active power drain (210) of an X-ray tube (200). The connector (100) comprises a first connection unit (110) comprising a plurality of first contact elements (111) connectable to the power source, and a second connection unit (120) comprising a plurality of second contact elements (121) connectable to power drains of the X-ray tube. The first connection unit (110) and the second connection unit (S120) are configured to be detachably connectable to each other in at least a first orientation (131) and a second orientation (132). The first contact elements (111) and the second contact elements (121) are configured to engage with each other when the first connection unit (110) is connected to the second connection unit (120) such that an electrical contact of the first contact elements (111) with a subset of the second contact elements (121) is established. The subset of second contact elements (121) to which electric contact is established is different between the first orientation (131) and the second orientation (132). At least one (112) of the first contact elements (111) is configured to establish the electric contact with a first one (122) of the second contact elements (121) when the first connection unit (110) and the second connection unit (120) are connected in the first orientation (131), and to establish the electric contact with a different second one (123) of the second contact elements (121) when the first connection unit (110) and the second connection unit (120) are connected in the second orientation (132).

Some embodiments include a method comprising: providing a substrate, the substrate comprising a nanotube layer, the nanotube layer comprising nanotubes; the nanotube layer is heated; and destroying at least a portion of the nanotube layer by heating such that the nanotubes in the at least a portion of the nanotube layer are activated for electron emission. Other embodiments include an X-ray device including a substrate including nanotubes formed by the method.

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.

The present disclosure relates to an X-ray generating apparatus capable of providing an X-ray image and an X-ray system using the same, including: a field emitting part having a plurality of electron beam emitting regions arranged; an X-ray generating part generating X-rays by collision with electrons emitted from the field emitting part; and, a collimator transmitting X-rays generated from the X-ray generating part in a specific direction, in which a plurality of through-holes are arranged on the collimator to transmit the X-rays in a specific direction, and the X-ray can be blocked in a region other than the through-hole.

An X-ray therapy method using an X-ray device includes: arranging the cathode device of an X-ray source in an imaging mode to focus electrons onto a focal region of a first size on the anode. In imaging mode, the X-ray source is actuated to emit an X-ray beam toward an X-ray detector to obtain a first X-ray image of a target. Based on a comparison of the first X-ray image and a diagnostic image, the X-ray source or object is adjusted to register the target with its diagnostic image, and the X-ray source is directed toward the target. The cathode device is switched to a power mode to focus electrons onto a second focal region of a second size on the anode, which is larger than the first size. In power mode, the X-ray source is actuated to deliver a therapeutic X-ray dose to the target.

Some embodiments include a system having multiple x-ray sources, each x-ray source including an electron source configured to generate an electron beam and a target configured to receive the electron beam and convert the electron beam into an x-ray beam, where a first one of the x-ray sources is different from a second one of the x-ray sources, and the target of the x-ray source is a portion of the linear target.

Embodiments include an apparatus, comprising: a conductive base; an insulating substrate; an electron emitter disposed on the insulating substrate; a grid disposed adjacent to the electron emitter, the grid including a first conductive side and a second conductive side separate from the first conductive side; a plurality of posts; wherein: the first conductive side is attached to the insulating substrate through a first group of the posts; the second conductive side is attached to the insulating substrate through a second group of the posts; and the conductive base is attached to the insulating substrate through a third group of the posts.

One or more example embodiments relates to a cathode device and an X-ray source. The cathode device for an X-ray source has an electron emitter including a plurality of field effect emitter elements aligned in parallel to form an emission surface on the upper side of the plurality of field effect emitter elements aligned in parallel a gate electrode, arranged above the emission surface, a multiple first contact elements for at least two independently current-carrying current paths of the electron emitter, electrons from at least one of the current paths are emittable depending on an emission voltage between the gate electrode and the emission surface via the field effect emitter elements; and an emitter seat including multiple second contact elements, the multiple second contact elements connectable with the multiple first contact elements for closing the current paths.

Various systems are provided for a cathode of an X-ray imaging system. In one example, a shield for a cathode comprises a cathode mask comprising a u-shaped central opening configured to receive a cathode cup, where a perimeter of the u-shaped central opening comprises a rolled over edge.

Some embodiments include a system, comprising: at least one x-ray source, each x-ray source including: an electron source configured to generate an electron beam; and a target configured to receive the electron beam and convert the electron beam into an x-ray beam; and a collimator. A first edge of the collimator closest to the electron source is closer to the electron source than a central axis of the x-ray beam before entering the collimator; and a second edge of the collimator opposite to the first edge is at the central axis of the x-ray beam before entering the collimator or closer to the electron source than the central axis of the x-ray beam before entering the collimator.

The present invention relates to a device of controlling an electron emission device generating X-rays, the device comprising: an electron emission device including at least one of at least one cathode electrode, an anode electrode paired with the cathode electrode, and a gate electrode for controlling a current flowing through the anode electrode; a cathode current detection part for detecting a current flowing through the cathode electrode of the electrode emission device; a reference voltage generation part for generating a reference voltage; and a gate voltage control part which receives the reference voltage and a detection voltage of the cathode current detection part, determines a gate voltage for controlling the electron emission device so that the detection voltage of the cathode current detection part becomes equal to the reference voltage, and applies the determined gate voltage to the gate electrode of the electron emission device.

An X-ray tube has a tube body, which encloses a tube volume in a gas-tight manner. An emitter electrode, a gate electrode and an anode are arranged within the tube volume. The emitter electrode is embodied as an unheated electrode which has a plurality of emitter needles arranged on a substrate in a region facing the gate electrode. The gate electrode is divided into a main region and a number of additional regions by insulating structures introduced into the gate electrode. An emission voltage is applied to the main region relative to the emitter electrode. The additional regions are electrically conductively connected to the main region only by way of connecting bridges. At least one cutout of the gate electrode is arranged in the additional regions in each case.

Embodiments include an apparatus, comprising: a conductive base; an insulating substrate; an electron emitter disposed on the insulating substrate; a grid disposed adjacent to the electron emitter, the grid including a first conductive side and a second conductive side separate from the first conductive side; a plurality of posts; wherein: the first conductive side is attached to the insulating substrate through a first group of the posts; the second conductive side is attached to the insulating substrate through a second group of the posts; and the conductive base is attached to the insulating substrate through a third group of the posts.

This invention relates to cathode devices and X-ray sources. A cathode device for an X-ray source according to the invention comprises: - an electron emitter; and - an emitter holder, wherein the electron emitter comprises: - a plurality of parallel-oriented field-effect emitter elements constituting an emitting surface, - a gate electrode disposed above the emitting surface, - and a plurality of first contact elements, characterized in that: - the emitter holder has a plurality of second contact elements, the second contact elements being connectable to the plurality of first contact elements to close a current path, - the plurality of first contact elements being disposed on the side of the plurality of parallel-oriented field-effect emitter elements opposite to the emitting surface.

The present invention relates to a connector for selecting an active power drain of an X-ray tube. The connector comprises a first connection unit comprising a plurality of first contact elements, and a second connection unit comprising a plurality of second contact elements, wherein the first connection unit and the second connection unit are configured to be detachably connectable to each other in at least a first orientation and a second orientation, and wherein the first contact elements and the second contact elements are configured to engage with each other when the first connection unit is connected to the second connection unit such that an electrical contact of at least a subset of the first contact elements with a respective one of the second contact elements is established. At least one of the first contact elements is configured to establish the electric contact with a first one of the second contact elements when the first connection unit and the second connection unit are connected in the first orientation, and to establish the electric contact with a second one of the second contact elements when the first connection unit and the second connection unit are connected in the second orientation, wherein the first one of the second contact elements and the second one of the second contact elements are different from each other.

An X-ray tube according to an embodiment of the present invention comprises: a positive electrode having a target layer that emits X-rays in response to the incidence of an electron beam; and a negative electrode in which three electron guns are arranged in parallel, each having a filament for emitting electrons, a stowage groove in which the filament is stowed, and a focusing groove for causing the electrons emitted from the filament to be focused as an electron beam at the target layer. The three electron guns are a central electron gun facing the positive electrode, and two side electron guns located on opposite sides of the central electron gun. In the central electron gun, the following match: a filament central axis running along the longitudinal direction at the center of the width direction of the filament; and a stowage groove central axis running along the longitudinal direction at the center of the width direction of the stowage groove match. The central electron gun is configured so that a focusing groove central axis running along the longitudinal direction at the center of the width direction of the focusing groove is offset from the filament central axis.

The present disclosure provides a cathode emission device. The cathode emission device may comprise a cathode assembly, including: a first filament, a second filament, and a grid electrode. The grid electrode may be operably connected to the first filament and surrounding the first filament and the second filament. The cathode assembly may be configured to be operably connected to a high-voltage generator and switchable between a first connection configuration and a second connection configuration.

The invention relates to a computed tomography scanner comprising a static radiator-detector ring (10) which is composed of an odd number (n) of radiator-detector elements (11, 12, 13, 14, 26), one unique radiator-detector element (26) of which is movable relative to the remaining, jointly describing C-shaped radiator-detector elements (11, 12, 13, 14) such that the radiator-detector ring (10) is opened, wherein each radiator-detector element (11, 12, 13, 14, 26) has an anode system (9) arranged for emitting X-rays which extends over an angle a of at least 0.9 x 360° / n on the circumference of the radiator-detector ring (10) and a detector (4) arranged for detecting X-rays which extends over an angle β of at least 0.95 x 360° / n within the same radiator-detector element (11, 12, 13, 14, 26), and each anode system (9) is part of a radiator system (18) comprising a plurality of electron emitters (5, 25), each of which is designed to produce a focal point (BF ‑ , BF, BF + ) on the anode system (9) in one of at least three selectable positions in cooperation with an electrode system (21).

An X-ray tube (1) has a tube body (2) that gas-tightly encloses a tube volume (3). An emitter electrode (4), a gate electrode (5), and an anode (6) are arranged within the tube volume (3). The emitter electrode (4) is designed as an unheated electrode and has a plurality of emitter needles (7) arranged on a substrate (8) in a region facing the gate electrode (5). The arrangement of the emitter electrode (4) and the gate electrode (5) is such that, when an emission voltage (U') is applied between the emitter electrode (4) and the gate electrode (5), electrons (10) are emitted from the emitter needles (7) at the tips (9) of the emitter needles (7) due to the resulting electric field.The gate electrode (5) has recesses (11) under which a portion of the emitter needles (7) is arranged, so that the electrons (10) emitted from the tips (9) of the emitter needles (7) arranged under the respective recess (11) are accelerated through the recesses (11) towards the anode (6) due to a high voltage (U) applied between the emitter electrode (4) and the anode (6). The gate electrode (5) is divided into a main region (14) and several auxiliary regions (15) by insulating structures (13) incorporated into the gate electrode (5). The emission voltage (U') is applied to the main region (14) relative to the emitter electrode (4). The auxiliary regions (15) are electrically connected to the main region (14) only via connecting bridges (16). Each auxiliary region (15) has at least one recess (11).

An X-ray tube has a tube body which encloses a tube volume in a gas-tight manner. An emitter electrode, a gate electrode, and an anode are disposed within the tube volume. The emitter electrode is designed as an unheated electrode, which has a plurality of emitter needles arranged on the substrate in a region facing the gate electrode. The arrangements of the emitter needle and the gate electrode match each other such that electrons are emitted from the emitter needle at the tip of the emitter needle due to the electric field thus formed by applying an emission voltage between the emitter electrode and the gate electrode. The gate electrodes have recesses below which portions of the emitter needles are respectively disposed such that electrons emitted from tips of the emitter needles disposed below the respective recesses are accelerated through the recesses toward the anode due to a high voltage applied between the emitter electrode and the anode. The gate electrode is divided into a main region and a plurality of additional regions by an insulating structure introduced into the gate electrode. An emission voltage is applied to the main region with respect to the emission electrode.

1. A system comprising: a vacuum enclosure; an anode support structure extending through the vacuum enclosure and including a plurality of first cooling passages; and an anode disposed within the vacuum enclosure and coupled to and supported by the anode support structure, the anode including a target and a plurality of second cooling passages, each of the second cooling passages coupled to a corresponding first cooling passage, the anode being coupled to the anode support structure on a side of the anode that is different from a side of the anode that includes the target and an axial end of the anode on a long axis of the anode.

Providing an anode cooling mechanism for an X-ray system that includes an emitter array emitting multiple electron beams and an anode containing a target whose length is considerably longer than its width. [Solution] A system comprising a vacuum enclosure, an anode support structure penetrating the vacuum enclosure and including a plurality of first cooling passages, and an anode located within the vacuum enclosure, coupled to and supported by the anode support structure, and including a target and a plurality of second cooling passages, each of which is coupled to a corresponding first cooling passage, and the anode is coupled to the anode support structure on a side of the anode that is different from the side of the anode including the target and different from the axial end of the anode on the long axis of the anode.

Some embodiments include an x-ray system, comprising: a vacuum enclosure; a plurality of electron sources disposed within the vacuum enclosure; an anode including at least one target with a plurality of focal spots disposed in a planar array within the vacuum enclosure, each focal spot configured to generate an x-ray beam in response to an electron beam from a corresponding one of the electron sources; a plurality of first collimators disposed within the vacuum enclosure, each first collimator associated with a corresponding one of the focal spots and configured to collimate the x-ray beam of the corresponding focal spot; and a second collimator integrated with a housing of the vacuum enclosure or external to the vacuum enclosure, the second collimator configured to collimate each of the x-ray beams.

The present invention relates to a high voltage connector (100) for selecting an active power drain (210) of an X-ray tube (200). The connector (100) comprises a first connection unit (110) comprising a plurality of first contact elements (111) connectable to the power source, and a second connection unit (120) comprising a plurality of second contact elements (121) connectable to power drains of the X-ray tube. The first connection unit (110) and the second connection unit (S120) are configured to be detachably connectable to each other in at least a first orientation (131) and a second orientation (132). The first contact elements (111) and the second contact elements (121) are configured to engage with each other when the first connection unit (110) is connected to the second connection unit (120) such that an electrical contact of the first contact elements (111) with a subset of the second contact elements (121) is established. The subset of second contact elements (121) to which electric contact is established is different between the first orientation (131) and the second orientation (132). At least one (112) of the first contact elements (111) is configured to establish the electric contact with a first one (122) of the second contact elements (121) when the first connection unit (110) and the second connection unit (120) are connected in the first orientation (131), and to establish the electric contact with a different second one (123) of the second contact elements (121) when the first connection unit (110) and the second connection unit (120) are connected in the second orientation (132).

The present application relates to a method for manufacturing a densified carbon structure-based film, the method comprising: a step for providing a carbon structure-based film; and a carbon structure-based film densification step for obtaining a densified carbon structure-based film by immersing the carbon structure-based film in a polar solvent and then in an acidic aqueous solution, or obtaining a densified carbon structure-based film by immersing the carbon structure-based film in an acidic aqueous solution and then in a polar solvent.