355results about "Handling using diaphragms/collimeters" patented technology

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.

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 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.

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.

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).

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 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.

Systems, methods, and computer software are disclosed for receiving a video stream and acquiring images capturing at least a portion of a shape representative of a radiation field generated by a radiation delivery system that includes a radiation source configured to deliver the radiation beam, the acquired images extracted from the video stream.

The invention discloses a collimator and magnetron sputtering equipment, the disclosed collimator comprises an annular base part and a central adjusting part, the central adjusting part comprises a plurality of central enclosures, the annular base part surrounds the plurality of central enclosures, the plurality of central enclosures are movably arranged on the annular base part, and the central enclosures are arranged on the annular base part. A central through hole penetrating in the extending direction of the central axis of the annular base part is defined by the multiple central enclosures, and the multiple central enclosures can move in the radial direction of the central through hole relative to the annular base part so as to adjust the hole diameter of the defined central through hole. According to the scheme, the problem that the uniformity of a deposited film is poor when a collimator in the related technology is adopted to perform a film deposition process on magnetron sputtering equipment can be solved.

The disclosure relates to a Mobile Fluoroscopic Device consisting of a Mini-C Arm assembly containing a stepless collimating apparatus which is adjustable using pairs of linear translating, opaque to x-ray plates (2). Each pair of plates are operated by a drive mechanism including a motor (3), gears (4, 6), and racks (5) making it possible to increase or decrease the cross-sectional area of the x-ray beam relative to the x-ray sensor surface area.

The present disclosure relates to a collimator. The collimator may include a motor, a transmission unit having a first end and a second end, and a leaf unit having a leaf. The first end of the transmission unit may be connected to the motor and the second end of the transmission unit may be connected to the leaf. The present disclosure also relates to a collimator system. The collimator system may include a leaf module having a leaf, a driving module having a motor configured to drive the leaf, and a processing module to generate a movement profile of the leaf. The movement profile of the leaf may include a first speed during a first stage, a second speed of the leaf during a second stage, and a third speed of the leaf during a third stage.

[Problem statement] Provision of a technology relating to a window holding section, an X-ray generator, an X-ray analyzer, a control method for an X-ray generator and a control system for an X-ray generator, wherein the technology is such that it is not necessary to provide an X-ray observation section in a vacuum area and that it is not necessary to use any part of the X-rays used for the measurement of the X-ray analysis. [SOLUTION] According to one embodiment of the present invention, an X-ray generator (20) is provided. The X-ray generator (20) is equipped with an X-ray generating unit (203a) and an X-ray transmission window. The X-ray generating unit (203a) is configured to generate X-rays by receiving an electron beam from an external source. The X-ray transmission window comprises a first X-ray transmission window (204a) and a second X-ray transmission window (205a). The first X-ray transmission window (204a) is configured to transmit first X-rays (L1) directed in a first direction (D1) among the X-rays. The first X-rays (L1) fall onto an X-ray observation section (21) that is arranged on the optical axis of the first X-rays and that can observe the X-ray focal point of the X-rays.The second X-ray transmission window (205a) is arranged such that it transmits second X-rays (L2) from the X-rays, which are oriented in a second direction (D2) that differs from the first direction (D1).

Rotating collimator with curved slit Collimation device (5) for an X-ray detection system (1), the collimation device comprising a substantially planar support (51) made of a material with partial or zero radio transparency, the support being intended to be rotated about an axis of rotation (52) perpendicular to the plane in which the support extends, said support being provided with a slit (54) totally transparent to X-rays and passing through the thickness of the support to create a flux of X-rays when the support is exposed to an X-ray source, the shape of the slit in projection in the plane of the support being a curve. Figure for abstract: figure 2

Described herein are multi-leaf collimators that comprise leaf drive mechanisms. The leaf drive mechanisms can be used in binary multi-leaf collimators used in emission-guided radiation therapy. One variation of a multi-leaf collimator comprises a pneumatics-based leaf drive mechanism. Another variation of a multi-leaf collimator comprises a spring-based leaf drive mechanism having a spring resonator.

The invention relates to a multileaf collimator comprising a plurality of leaves, the leaves being positioned next to one another and thus forming a leaf bank, it being possible to move the leaves translationally in order to adapt the shape of an irradiation field of an irradiation device, a guide device being provided which guides the translational movement of a plurality of the leaves of the leaf bank, and there being at least one leaf, the translational movement of which is not guided by the guide device, positioned between adjacent leaves that are guided by the guide device. The invention also relates to an irradiation system.

Provided herein are neutron imaging systems (e.g., radiography and tomography) systems and methods that provide, for example, high-quality, high throughput 2D and 3D fast or thermal neutron and / or X-ray images. Such systems and methods find use for the commercial-scale imaging of industrial components. In certain embodiments, provided herein are system comprising a plurality of independent neutron absorber-lined collimators (e.g., 4 or more collimators) extending outwards from a central neutron source assembly.

A method of measuring a rotational position of an assembly having circumferential ferromagnetic teeth includes applying (1302) a periodic excitation signal to an actuator, the periodicity causing a first rotational displacement of a first ferromagnetic tooth from a first rotational position to a second rotational position and a second rotational displacement of a second ferromagnetic tooth from the second rotational position to a third rotational position. The method also includes measuring (1303) a plurality of first signal outputs from a magnetoresistive sensor during the periodicity; determining one or more signal offset values based on the plurality of first signal outputs; applying the excitation signal to the actuator for a portion of a second periodicity; measuring a second signal output from the magnetoresistive sensor; generating (1304) a corrected signal by modifying the second signal output with the signal offset values; and determining (1305) the rotational position of the assembly based on the corrected signal.