463results about "Handling using diaphragms/collimeters" patented technology

An x-ray breast imaging system includes a breast support platform including an x-ray receptor, and an x-ray tube head. The x-ray tube head includes an x-ray source configured to emit an x-ray beam in a direction towards the x-ray receptor, and a collimator. A filter assembly including a plurality of filter slots selectively positionable adjacent to the collimator, and a specimen imaging filter disposed within a slot of the plurality of filter slots. The specimen imaging filter includes at least one aperture defined therein. The specimen imaging filter also blocks a portion of the emitted x-ray beam so that the at least one aperture defines a path of the emitted x-ray beam towards the x-ray receptor.

An imaging device is provided. The imaging device includes an X-ray tube, a collimator, and a detector. The collimator includes an opening, wherein the collimator has a width in a first direction and a length in a second direction. The opening has an opening width in the width direction of the collimator, and an opening at at least one end of the collimator in the second direction has an opening width smaller than that of an opening within the middle section of the collimator.

The invention relates to a low-shadow wide-angle-loss fast ion detector for a magnetic confinement fusion device, which comprises a double-collimator system and a light path connecting tube, the double-collimator system comprises a collimator front part, a collimator rear part and a scintillator sheet, the collimator front part is provided with a forward collimation front hole and a reverse collimation front hole, and the collimator rear part is provided with a reverse collimation front hole; a forward collimation rear hole and a reverse collimation rear hole are formed in the collimator rear portion, the scintillator sheets are arranged on the side faces of the forward collimator and the reverse collimator, and the length of the forward collimation rear hole and the length of the reverse collimation rear hole and the distance between the forward collimator and the reverse collimator in the y-axis direction are calculated and determined through a detector simulation program. Overlapping of detection areas can be avoided; one end of the light path connecting pipe is fixedly arranged on the double-collimation system, and the other end of the light path connecting pipe is provided with external threads and used for being in threaded connection with a rear-end light path pipeline. According to the method, the track shadow can be reduced under the condition that the wide throwing angle detection range is ensured.

An electromagnetic radiation collimator comprising: a radiopaque elongated housing having a first end and a second end, wherein the housing houses an array of parallel radiolucent beam paths, wherein each of the beam paths extend from the first end to the second end, wherein each of the beam paths has an entrance aperture at the first end, and an exit aperture at the second end; the entrance aperture through which source electromagnetic radiation passes into the beam paths, wherein the beam paths emits an electromagnetic radiation beam from the exit aperture when the source electromagnetic radiation beams are in line with the longitudinal axis of the beam path or having a predetermined angle of deviation from the longitudinal axis of the beam path.

The invention discloses a beam capturing device for reducing neutron back scattering background and a neutron source system.The beam capturing device comprises an internal high-density polyethylene layer, an external lead layer, an external high-density polyethylene layer and an external steel layer which are sequentially arranged from inside to outside, and the internal high-density polyethylene layer is of a hollow structure; a first through hole is formed in the side wall of the outer steel layer, a second through hole is formed in the side wall of the outer high-density polyethylene layer, a third through hole and a fourth through hole are formed in the top of the outer lead layer, and the first through hole, the second through hole, the third through hole and a center through hole of the inner high-density polyethylene layer are sequentially communicated to form a beam channel. A B4C absorption layer is arranged in the fourth through hole, the B4C absorption layer directly faces the beam channel, an internal lead layer is arranged on the face, directly facing the beam channel, of the B4C absorption layer, and effective shielding can be achieved through the device and the neutron source system.

An x-ray imaging apparatus includes a holdable housing; an x-ray source mounted within the housing and configured to output a fan beam of x-rays; and a hoop chopper wheel rotatably mounted within the housing and comprising an x-ray attenuating material configured to block x-rays of the fan beam. The hoop chopper wheel defines a set of beam apertures of which each aperture is configured to pass therethrough a corresponding angular portion of x-rays from the fan beam, so that rotation of the hoop chopper wheel causes scanning of the corresponding angular portion of x-rays. The x-ray source may be a transmission-type x-ray tube configured to output the fan beam centered in an x-ray extraction direction forming an angle greater than 0 degrees with respect to a longitudinal axis of the x-ray tube.

An exemplary embodiment of the present disclosure provides a chip-scale atomic beam system comprising an atomic vapor source, a plurality of channels, and a propagation chamber. The atomic vapor source chamber can comprise an atomic vapor source configured to emit an atomic vapor. The plurality of channels can have first ends and second ends. The first ends can be in fluid communication with the atomic vapor source chamber. The plurality of channels can be configured to collimate the atomic vapor as it moves through the plurality of channels from the first ends to the second ends. The propagation chamber can be in fluid communication with the second ends of the plurality of channels. The propagation chamber can have an internal pressure less than an internal pressure of the atomic vapor source chamber to enable the collimated atomic vapor to propagate through the propagation chamber.

An MLC is provided, the MLC includes: a plurality of leaves; first driving mechanisms connected to the leaves and configured to drive the leaves to move to form a radiation field; and at least one leaf head mechanism mounted on at least one corresponding leaf of the leaves and configured to adjust the radiation field.

Various systems and methods are provided for a system and a computer-implemented method to dynamically configure a collimator aperture of a CT imaging system. The system may be provided to dynamically configure a collimator aperture over a slice coverage of a CT imaging system. The system may, further, provide a processor programmed to select an X-ray dose efficiency based on one or more parameters and dynamically configure a collimator aperture of the system within a reliability range of a calibration curve based on the selected X-ray dose efficiency and flux measured by the X-ray detector.

The invention discloses a composite shielding collimator suitable for a complex mixed radiation field, belongs to the technical field of radiation shielding and measurement, and mainly solves the problems of low signal-to-noise ratio, high space background and mixed energy spectrum caused by the mixed radiation field of high-energy neutrons, gamma rays and the like in a fusion device and the problem that traditional equipment is heavy and difficult to flexibly adjust. The composite shielding collimator adopts a cylindrical shielding structure formed by aluminum oxide, boron-containing polyethylene, boron carbide and lead from outside to inside, and background interference and secondary radiation are remarkably inhibited by moderating and absorbing neutrons step by step and effectively shielding gamma rays; the neutron and gamma ray detector is integrally integrated on a rotatable supporting mechanism, unification of excellent radiation shielding performance and detection flexibility is achieved, and the neutron and gamma ray detector is mainly used for high-precision neutron and gamma ray diagnosis in complex radiation environments such as a magnetic confinement fusion device.

An electron applicator, which is used along with a linear accelerator in a FLASH radiotherapy treatment program, includes an integrated dosimeter for accurately measuring the FLASH radiation levels, and an interchangeable high-density polymer cutout which can be easily, inexpensively, and accurately formed to match the irregular shape of a tumor.

The present specification discloses a multi-view X-ray inspection system having, in one of several embodiments, a three-view configuration with three X-ray sources. Each X-ray source rotates and is configured to emit a rotating X-ray pencil beam and at least two detector arrays, where each detector array has multiple non-pixellated detectors such that at least a portion of the non-pixellated detectors are oriented toward both the two X-ray sources.

The invention discloses a translational photon optical shutter device capable of being combined with multiple inserts, and the device is characterized in that the device comprises an optical shutter switching assembly, a vacuum chamber, a driving mechanism, and a hinge assembly; the optical shutter switching assembly and the hinge assembly are installed in the vacuum chamber, and the driving mechanism is located outside the vacuum chamber. The driving mechanism drives the optical shutter switching assembly to do reciprocating translation through the hinge assembly and is used for switching control over light passing and light blocking of synchrotron radiation light. An absorber is arranged in the optical shutter switching assembly, the top of the absorber is a light receiving face, and the light receiving face comprises a plurality of inclined faces which are obliquely upward in the incidence direction of synchrotron radiation light and used for blocking the synchrotron radiation light generated by various insertion pieces at the same time. The design of the multi-inclined-plane absorber can block synchrotron radiation light generated by various inserts at the same time, so that the valuable axial space occupied by the device in a light beam line is effectively shortened, and a solid technical basis is provided for the design and layout optimization of the light beam line combined by multiple inserts.

The collimator (3) for a radiological equipment (1) comprises shielding means (6, 7, 9, 10, 11) made of tungsten-based radiation-absorbent plastic material; such means may be proximal radiated field closure elements and / or radiated field propagation elements; such means comprise at least one radiated radiogenic field propagation element (6).

A linear accelerator in data communication with a computing device and a programmable logic controller and including a magnetron, an electron gun that is configured to direct an accelerated beam of el

The invention relates to an X-beam collimator for a crystal diffraction experiment. A main body of the X-beam collimator is of a stepped structure comprising an upper end thin part and a lower end thick part; the fixing hole is formed in the upper end thin part of the main body and is fixedly connected with an external driving motor to drive the main body to move; the loading hole is formed in the thick part of the lower end of the main body and is a cylindrical blind hole; the light beam control piece is of a cylindrical structure and is made of platinum iridium alloy, a small round hole is formed in the center of the light beam control piece, and the light beam control piece is installed in the loading hole in a matched mode. The light-transmitting hole is formed in the bottom of the loading hole, the axis of the light-transmitting hole is collinear with the light path axis of the coaxial microscope and the diffractometer, and the light-transmitting hole is used for allowing the X beams screened by the small hole to pass through. The fixing holes are fixedly connected with the motor, so that the motor can drive the main body to move; light beam control sheets with different light beam size control capabilities are loaded through the loading holes; the X-ray beam passes through the collimator through the light hole, the structure is simple, the size and the mass are small, and rapid collimation and size control of the X-ray beam can be achieved.

One exemplary adjustable collimator includes a housing having an aperture through which radiation is directed from an entrance to an exit of the housing, a first shutter 206 and a second shutter 208 within the housing, a first link 222 coupled to the first shutter, and a first yoke 218 coupled to the housing at a pivot point (at 220) and configured to pivot relative to the housing. The first yoke is configured to reduce the effective width of the aperture by moving the first shutter toward the second shutter via the first link when the first yoke is rotated in a first direction (here, clockwise).

The invention relates to a device for receiving a beam path assembly for X-ray radiation, the device having a base plate through which a through-hole for X-ray radiation passes, and a sheet metal part having a base part and a cover, the base part extending in a plane in the base plane of the sheet metal part, the sheet metal part being curved, and the cover being arranged in the base plane of the sheet metal part. The sheet metal part is fixed relative to the base plate by mutual pressing of the base and the plane of the base plate such that the cover shields the ambient region of the base plate against scattered beams of X-ray radiation directed from the edge region of the through-hole to the ambient region of the base plate.

An x-ray scanning system, and corresponding method, includes an x-ray source that produces incident x-ray radiation having end-point x-ray energy, which, in various embodiments, can be greater than about 200 keV, between about 200 keV and about 500 keV, or greater than about 500 keV. The system also includes a disk chopper wheel that can be irradiated by and attenuate the incident x-ray radiation. The disk chopper wheel further defines one or more slits configured to pass the incident x-ray radiation through the disk chopper wheel for scanning a target. In some embodiments, the high end-point x-ray energies with disk chopper wheels are facilitated by forming the incident x-ray radiation as a collimated fan beam and / or orienting the chopper wheel with a wheel plane substantially non-perpendicular to a fan beam plane, increasing effective thickness of a disk chopper wheel to attenuate incident x-rays of higher energies.

The particle beam therapy device is a charged particle beam therapy device that irradiates a patient with a helium ion beam to perform treatment, wherein where another beam, for example, a deuterium beam, that differs in a nuclide from the helium ion beam is generated from a cation beam, a mixed beam in which the helium ion beam and the other beam are mixed is passed through a deflecting magnetic field of a deflecting electromagnet, and then the helium ion beam of the mixed beam is selectively passed by a passage selection unit.

X-ray system (2) comprising an X-ray source (4) which, during operation, generates X-ray radiation (10) at several X-ray focal spots (8), - wherein each X-ray focal spot (8) is assigned a collimator (12) which selects the X-ray radiation (10) generated in the respective X-ray focal spot (8) and directed towards a common detector (14), and - wherein the collimators (12) are arranged in a fixed position with respect to their respective associated X-ray focal spot (8).

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.

The present invention discloses a square-hole particle beam collimator with continuously adjustable aperture and its aperture adjustment method. In the collimator, a rotating disk is provided in the collimator main body. The rotating disk is provided with disk through holes and a plurality of arc-shaped guide grooves. A pair of first collimating blocks and a pair of second collimating blocks are respectively provided on both sides of the rotating disk. Contact sleeves are also respectively provided on each collimating block. Each contact sleeve slides along the arc-shaped guide groove when the rotating disk rotates. A linkage assembly connected to the power output end of the aperture adjustment driving mechanism is also provided outside the rotating disk. The aperture adjustment method is that when the rotating disk rotates, each arc-shaped guide groove drives the contact sleeve to move, thereby driving the first collimating block and the second collimating block to perform opening and closing actions respectively. When the channel distance between the two first collimating blocks and the second collimating blocks changes, the aperture of the square hole changes accordingly. This collimator has a compact structure and is convenient to use, and can be preferably applied to the accompanying proton beam of the China Spallation Neutron Source.

The invention relates to a scattering radiation mask, an arrangement for X-ray imaging, a method for manufacturing a scattering radiation mask and a method for identifying a scattering radiation mask. The scattering radiation mask according to the invention for reducing X-ray scattering radiation, in particular for X-ray imaging, has - an absorption structure produced by an additive manufacturing process, which exhibits an aperiodic pattern in a central section that is not a boundary region, - wherein the absorption structure comprises X-ray-absorbing mask walls, - wherein several mask walls each form a cell-like structure with a laterally enclosed, X-ray-transparent beam channel, characterized in that that in the central section every cell-like structure has the same shape and the same area.

A mount for an array of leaf drive units corresponding to a single leaf bank of a multi-leaf collimator comprises a plurality of separable mounting plates. Each mounting plate comprises an array of mounting holes, and each mounting hole is arranged to receive a respective one of the leaf drive units.

A personalized heating system is disclosed. The system includes: a heat source; one or more actuators configured to set a direction of heat emitted by the heat source; one or more sensors that capture sensor data about an environment; a processor; and programming instructions that are configured to, when executed, cause the processor to perform various functions. The functions include processing the sensor data and identifying a target person in the environment, along with a first target area for the target person. The system will cause the one or more actuators to set the direction of heat emitted by the heat source toward the first target area. The system will then cause the heat source to generate heat and directing heat as a heat beam toward the first target area.

The present invention provides a cooling system for an X-ray apparatus, the cooling system having an upper cooling unit TCU having a heat exchanger plate with an integrated cooling fluid circuit, and a support arm configured to attach the TCU and to attach a monoblock of an X-ray source of the X-ray apparatus, in particular a C-arm, and the fluid circuit is arranged on the main surface of the heat exchanger plate so as to capture heat through the main surface.

Provided are a collimator, a radiation detection device, and a radiation inspection device that are capable of further removing scattered radiation. This collimator 20 comprises: a radiation blocking section 22; and a radiation transmission section 21 that has a lower radiation blocking rate than the radiation blocking section 22, penetrates the radiation blocking section 22, and is solid. The X-ray transmission section 21 of the collimator 20 is solid therefore X-rays on the low-energy side that have been scattered by a subject B in the X-ray transmission section 21 are absorbed, as a result of this collimator 20. Accordingly, there is little noise contained in X-rays detected by a radiation detection element 30 and a high-resolution X-ray image can be obtained.

The invention provides a radioactive source for a thickness measuring device, and the radioactive source comprises a box body part which is provided with a containing cavity and an exit window, and the containing cavity is used for containing beta radioactive gas; the collimation part is arranged on the box body part, a plurality of emergent channels which are arranged at intervals are formed, the emergent channels are conducted in the first direction, and the emergent window covers one end of each emergent channel; the electric field generating part is arranged in the box body part and is used for forming an electric field in the accommodating cavity; the direction of the electric field is parallel to the first direction, and the electric field points to the interior of the containing cavity from the emergent window. According to the radioactive source, beta rays emitted to the emergent window in the accommodating cavity or beta rays emitted through the emergent window can be screened by utilizing the collimating part, so that part of beta rays with high consistency with the first direction can be emitted out of the box body part through the emergent channel and the emergent window so as to participate in thickness measurement of an object to be measured; therefore, the collimation of the emitted beta ray is improved, and the measurement precision of the thickness measurement device is improved.