145results about "Handling using diaphragms/collimeters" patented technology

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.

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 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.

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 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.

[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).

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.

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.

The invention provides a compact motor-arranged multi-leaf grating device, and relates to the technical field of radiotherapy equipment, the compact motor-arranged multi-leaf grating device comprises a leaf frame, the leaf frame is provided with a plurality of guide chutes, the guide chutes are internally provided with leaves in a sliding manner, one side of the leaf frame is provided with a motor mounting groove rack, and the motor mounting groove rack is provided with a motor. A plurality of motors are fixedly installed on the motor installation groove frame, output shafts of the motors are connected with lead screws, the lead screws are in driving connection with the blades through a floating transmission assembly, and the problems that a traditional grating is large in occupied space, complex in machining and prone to clamping stagnation are solved.

An exemplary embodiment of the present disclosure provides a chip-scale atomic beam system including an atomic vapor source, a plurality of conduits, and a propagation chamber. The atomic vapor source chamber may include an atomic vapor source configured to emit atomic vapor. The plurality of conduits may have a first end and a second end. The first end may be in fluid communication with the atomic vapor source chamber. The plurality of conduits may be configured to collimate the atomic vapor as it travels through the plurality of conduits from the first end to the second end. The propagation chamber may be in fluid communication with the second ends of the plurality of conduits. The propagation chamber may have an internal pressure lower than an internal pressure of the atomic vapor source chamber to allow the collimated atomic vapor to propagate through the propagation chamber.

A method for generating an EUV light beam (12) by converting a target material (36) into a plasma state using a plurality of laser beams (30), the method comprising: generating the plurality of laser beams (30) using a plurality of laser beam sources (20); and converting the target material (36) into the plasma state by irradiating the target material (36) with the plurality of laser beams (30). During the irradiation of the target material (36) with the plurality of laser beams (30), each laser beam (30) strikes the target material (36) for a time period (46). The time periods (46) overlap within a time interval (48).

The invention concerns an apparatus comprising a collimator configured for collimate electromagnetic radiation emitted from an X-ray source, a sensor configured for acquiring data of an anatomy of a patient, and a processing unit. The processing unit is configured to calculate an optimal collimation position of the collimator based on the acquired data of the sensor, determine a movement of the collimator based on the calculated optimal collimation position, wherein the movement of the collimator comprises a rotation of the collimator around a central axis of the collimator. The invention further concerns an X-ray system comprising the apparatus and a method for moving a collimator for collimate electromagnetic radiation emitted form an X-ray source.

A collimator includes a collimator cover formed from a material with low radiation attenuation, and a plurality of septa formed from a radiation attenuating material. The collimator cover includes a base plate, a first side plate extending from the base plate, and a second, opposing side plate extending from the base plate. The first side plate has a plurality of first slots defined therein and the second side plate has a plurality of second slots defined therein. Each septum includes a first end retained in one first slot of the plurality of first slots and a second end retained in one corresponding second slot of the plurality of second slots.

The present invention relates to a collimation device (5) for an X-ray detection system (1), the collimation device comprising a carrier (51) of a substantially planar material having partial or zero X-ray transmissivity, the carrier being intended to rotate about a rotation axis (52) perpendicular to the plane of the carrier, the carrier being provided with a slit (54) that is completely transparent to X-rays and extends through the thickness of the carrier to generate an X-ray flux when the carrier is exposed to an X-ray source, wherein the shape of the slit is curved when projected onto the plane of the carrier.

The invention relates to a three-dimensional cooling atomic beam preparation device and method. The three-dimensional cooling atomic beam preparation device is characterized in that the emergent end of an atomic gas chamber is connected with the incident end of an atomic collimator; the emergent end of the atom collimator is connected with the incident end of the cooling cavity, the emergent end of the cooling cavity is connected with the incident end of the detection cavity through a pipeline, and the pipeline is connected with a vacuum pump; the three-dimensional cooling laser pair acts on the cooling cavity, and the upper detection laser and the lower detection laser oppositely act on the detection cavity up and down; the cut-off laser acts on the rear end of the cooling cavity; the atomic gas chamber is used for generating hot atoms; the atom collimator is used for forming a hot atom beam and enabling the hot atom beam to enter the cooling cavity; the cooling cavity forms a cold atom beam under the combined action of the three-dimensional cooling laser pair and enables the cold atom beam to enter the detection cavity; the two detection lasers enable an electric signal of the cold atom beam to form a fluorescence signal to be output; and the fluorescence collection device is used for collecting fluorescence signals and inputting the fluorescence signals into the computer for processing to obtain information such as three-dimensional temperature, flux, speed and speed distribution of the cold atom beam. According to the invention, high-flux and three-dimensional low-temperature atomic beam output is realized at the same time.

Disclosed is a neutron beam generation system for neutron capture therapy. According to an embodiment of the present disclosure, provided is a neutron beam generation system comprising: an injector which generates proton beams; an RF linear accelerator connected to the injector to accelerate the proton beams; a beamline which transmits the proton beams accelerated by the RF linear accelerator; a target which generates fast neutrons by colliding with the proton beams transmitted by the beamline; and a beam shaping assembly provided on one side of the beamline and configured to decelerate the fast neutrons into epithermal neutrons.

X-ray confinement system for high-sensitivity measurements. One aspect of the invention relates to an X-ray confinement system (2) comprising an X-ray source (10) with a window (11), an insulating enclosure (13) surrounding the X-ray source and comprising an orifice (13-1) opposite the window (11), and a confinement element (14) positioned outside the insulating enclosure (13) and comprising a recess (14-1) opening on either side of the confinement element (14) along the elongation axis () of the recess (14-1) and corresponding to the divergence geometry of the primary beam (). Figure to be published with the abstract: Figure 3

A leaf unit assembly for a multi-leaf collimator, comprising a leaf, a leaf actuator screw, and a rotatable portion. Wherein the leaf actuator screw has a first end fixedly attached to the leaf, and the rotatable portion is threadably engaged with the leaf actuator screw.

Device (1) for calibrating a PET system (S), wherein the PET system (S) has a plurality of detectors, wherein the PET system (S) has an opening (O) into which an element to be measured can be inserted, the device (1) comprising • at least one radiation source (Q), • at least one first collimator (K1) so that radiation from the radiation source (Q) can exit through a provided first opening (A1) at the collimator (K1). • wherein the device (1) defines an axial direction (R) with which the device (1) can be inserted into the PET system (S) for measurement, wherein the device (1) furthermore has a radial extension about the axial direction (R) thus defined, • wherein the device (1) can be moved radially and / or axially in the opening (O) in a predetermined manner so that detectors of the PET system (S) can be calibrated, • characterized in that the first collimator (K1) has a second opening (A2) for the emission of radiation, wherein the second opening (A2) is designed in the same way as the first opening (A1), and wherein the second opening (A2) is arranged at the same axial position as the first opening (A1) and opposite it on the radial extent.

The utility model discloses an opening adjusting device for a collimator of a radioactive waste barrel of a nuclear power station. The opening adjusting device comprises a base, a shell, an inner cylinder and a shielding assembly, the shell is detachably and fixedly installed on the base, the inner cylinder is rotationally connected into the shell, and the shielding assembly is installed between the inner cylinder and the shell; mutually communicated through holes are formed in the base, the inner cylinder and the shell, the shielding assembly comprises a plurality of blocking pieces and at least one driving piece, and the blocking pieces are slidably connected between the inner cylinder and the shell through the driving pieces; the multiple blocking pieces are matched with one another to define an adjusting hole, the inner cylinder is rotated, and the driving piece drives the multiple blocking pieces to move so as to adjust the size of the adjusting hole or completely seal the through hole. By changing the size of the adjusting hole, the beam limiting of large and small beam spots of the radiation source is adjusted, the adjustment is facilitated, the labor intensity is reduced, the adjustment efficiency is improved, the test cost is saved, more beam spots with different sizes can be adjusted for beam limiting, the application range is expanded, and the test efficiency and accuracy are improved.

A structure according to an embodiment is disposed between an X-ray emitter and a subject, and includes a scatterer configured to scatter X-rays emitted from the X-ray emitter, and a transmitter configured to transmit X-rays at a predetermined angle, among the X-rays scattered by the scatterer.

The invention provides an antisymmetric six-pole magnet. The antisymmetric six-pole magnet comprises a magnetic pole outer ring, a pole head and a magnet exciting coil, the pole head and the magnetic pole outer ring are integrated, the pole head comprises three pairs of sub pole head groups which are uniformly distributed on the inner wall of the magnetic pole outer ring and are oppositely arranged, two pairs of sub pole head groups respectively comprise two main pole heads which are oppositely arranged, and each sub pole head group in the other pair of sub pole head groups comprises two auxiliary pole heads with a preset interval. The main pole heads which are oppositely arranged have the same polarity, the auxiliary pole heads with the preset intervals have opposite polarities, and the adjacent main pole heads and auxiliary pole heads have opposite polarities. The geometric dimensions of the main pole heads are the same, and the sum of the volumes of the auxiliary pole heads with the preset intervals is smaller than the volume of each main pole head. And the excitation coil is wound on the pole head and is used for providing excitation current for the pole head. The auxiliary pole heads are used for reducing the coupling effect between the main pole heads so as to improve the magnetic field quality of the antisymmetric six-pole magnetic field in the magnetic pole outer ring.

Disclosed herein is an apparatus for forming an x-ray beam. The apparatus comprises a plurality of links pivotably coupled together, in an end-to-end manner, to form a continuous loop. The plurality of links comprises two or more links configured to block a transmission of an x-ray emission. The plurality of links also comprises at least one link comprising an aperture that is configured to allow only a portion of the x-ray emission to pass through the aperture.

The utility model discloses a collimator with a size-adjustable collimation opening, which comprises an adjusting assembly, and the adjusting assembly comprises a plurality of cylinders and collimation openings axially formed in the cylinders. The plurality of barrels are coaxially sleeved through the collimation openings in sequence, and the inner diameter of the collimation opening of each barrel is equal to or smaller than the outer diameter of the barrel on the adjacent inner side; according to the utility model, through the design of the multi-stage cylinder nesting structure, the aperture of the collimation opening of the collimator is simply adjusted, the adjustment difficulty of the collimation opening is reduced, the use convenience is improved, a plurality of sets of collimators with different opening apertures do not need to be processed, any driving device and any mechanical mechanism are not needed, the cost is saved, and the structure is simple.

A tuning method for a collimator of a CT machine, which, in each cycle of X-ray scan operation and stop, may include determining whether an X-ray is generated from the anode plate; calculating the Z-direction heating displacement of the slot plate during the current scan based on a detected X-ray, driving the slot plate to move by the heating displacement in the Z-direction, calculating the total Z-direction heating displacement of the slot plate at the end of the current scan, calculating the cooling displacement of the slot plate during the current stop based on the stop time of the X-ray, and driving the slot plate to move.