323 results about "Radiation beam" patented technology

The invention relates to a broadband planar array antenna light-operated beam forming method based on multi-task sparse learning, and the method comprises the steps: deducing an array factor expression of a broadband array as priori knowledge through employing a rectangular planar array antenna; constructing a multi-frequency-point beam joint optimization model of the planar array antenna based on the neural network; based on the priori knowledge, calculating a total loss function of the model by using expected broadband array pattern data and a group inhaul cable regularization method, and training a multi-frequency-spot beam joint optimization model; and based on the trained model, obtaining the optimal array layout and the amplitude and delay distribution of each array element, and calculating to obtain a low-sidelobe directional diagram in which the deflection angle is irrelevant to the frequency. According to the invention, the deflection angle of the array radiation beam is kept constant in a broadband range, and the problem of'beam squint 'of a traditional phased array is solved; and meanwhile, the beam sidelobe level of each frequency point is effectively suppressed, and the grating lobe problem of the uniform array on the broadband is avoided.

3D printing device and 3D printing method. The device comprising:a build platform having an external surface;means for providing a polymerizable fluid resin on said surface;a radiation source, to emit a radiation beam to said surface;beam positioning means, to variably position an impinging point of said beam; andmeans for controlling said source and said positioning means to manufacture a 3D tubular object according to a model;wherein the build platform comprises a stem forming a tubular shaped surface around a longitudinal axis, so that said external surface of said build platform is comprised in said tubular shaped surface, and said positioning means is configured to variably position said impinging point of said beam on different points of said fluid resin provided on said tubular shaped surface.

A radio-frequency identification (RFID) system includes RFID tags arranged in a plurality of separate rows, a RFID reader, and a computer system including a processor, a non-transitory computer readable medium, and one or more applications stored in the non-transitory computer readable medium. The one or more applications, when executed by the processor, initiate by the RFID reader a row scan, and modulate, using a beamforming control module, a configuration of a radiation beam. In addition, the one or more applications, when executed by the processor, modulate by a power control module an emission power of the reader antenna during the performance of the row scan, and detect by the RFID reader one or more of the RFID tags positioned along a row.

The present disclosure provides a calibration device for a super high dose rate radiation device comprising a plurality of beam modules for emitting a plurality of radiation beamlets, the calibration device comprising: a calibration target assembly comprising a target portion, wherein the target portion is located at a predetermined radiation region of the super high dose rate radiation device during a calibration process; wherein the target portion is used as a reference to calibrate a convergence deviation of the plurality of radiation beamlets converging at the predetermined radiation region. A calibration method and a super high dose rate radiation device are also provided.

A gearbox for an antenna, an antenna including the gearbox as well as a mobile communication base station including the antenna. The gearbox comprises at least two phase shift adjustment spindles that can be coupled to a respective phase shifter of the antenna and driven for electrically adjusting a radiation beam direction of the antenna. A rotary driving actuator of the gearbox is adapted to rotate a coupling element. A function selector actuator includes a movable function selector element that is fixed to the coupling element and to a coupling mechanism of the gearbox, wherein the function selector element is movable from a first position to a second position thereby actuating the coupling element and the coupling mechanism to either adjust a phase shifter or to select a phase shifter to be adjusted.

A quality assurance method for a radiotherapy device is disclosed. The method comprises disposing a phantom on a patient couch of the radiotherapy device, moving the patient couch to simulate motion of a subject, determining a measured value associated with the phantom, and comparing the measured value to an expected value. A radiotherapy device is also disclosed, the radiotherapy device comprising a radiation source configured to apply a radiation beam, a patient couch, a phantom disposable on the patient couch, and a controller communicatively coupled to the patient couch. A computer-readable medium storing instructions is also disclosed. A phantom for a radiotherapy device is also disclosed.

The invention relates to the technical field of antennas, in particular to an antenna unit, a base station antenna and communication equipment. The antenna unit can be widely applied to various base station antenna forms, including active and passive antenna systems. The antenna unit comprises an excitation unit, a metasurface radiation structure and a reflecting surface, the metasurface radiation structure and the reflecting surface are oppositely arranged at an interval, and the excitation unit is used for exciting the metasurface radiation structure to radiate electromagnetic signals; the reflecting surface is used for reflecting signals radiated by the metasurface radiation structure, and the distance between the metasurface radiation structure and the reflecting surface changes along the first direction. The direction of the radiation beam can be changed to realize deflection of the radiation beam.

Disclosed herein are methods for verifying whether a radiotherapy delivery system delivers therapeutic radiation to a target region in accordance with instructions from a radiotherapy system controller. The method utilizes imaging data acquired by a radiation imager (e.g., an MV detector) located opposite (e.g., positioned relative to) a therapeutic radiation source. In some variations, the imaging data from the radiation imager is used to determine whether a component of a radiation beam shaping assembly is in a position specified by the controller instructions. Also disclosed herein are methods for verifying whether a radiation beam emitted by the therapeutic radiation source intersects a target region and / or a contour around the target region, including methods for determining a delivery fluence and a dose estimate.

The embodiment of the invention provides a ray beam collimation system, and relates to the technical field of medical equipment. The ray beam collimation system comprises a primary collimator and a multi-leaf collimator. The primary collimator is provided with a through hole with a fixed shape and size, and the through hole is matched with the multi-leaf collimator in shape and size. And the primary collimator is positioned below the ray source and above the multi-leaf collimator. The multi-blade collimator comprises at least two blade groups composed of a plurality of blades, the tail end of each blade is provided with a concave-convex part, the concave-convex part comprises a plurality of first protrusions arranged at intervals in the first direction, a first recess is formed between every two adjacent first protrusions, the at least two blade groups comprise two blades opposite in the second direction, and the first protrusions are arranged at intervals in the first direction. The first protrusion of one of the two opposite blades is used for being connected with the first recess of the other blade in an inserted mode. The ray beam collimation system provided by the embodiment of the invention has the benefits that leakage rays between the tail ends of the blades are shielded, and the irradiation space of a patient in radiotherapy is increased.

Systems, devices and methods for internal dose adapted automated external radiation beam therapy, and systems and methods for an automated adaptive workflow to automatically generate a radiation treatment plan based on the internal dose and adapt the treatment plan to a current treatment session using a set of directives.

In various embodiments, a method of radiation therapy may include loading a planning image of a target within a human body. Furthermore, a position of the target may be monitored. An occurrence of substantial alignment between the position of the target and the position of the target in the planning image may be calculated. Furthermore, after the calculation, a radiation beam may be triggered to deliver a dose to the target within a brief period of time (e.g., less than one second).

Provided in the present application are an antenna, a communication device and a communication system. The antenna comprises a reflection plate and an adjustment device. The adjustment device is connected to the reflection plate, and is configured to drive the reflection plate to rotate, so as to adjust the orientation of a radiation beam from an element on the reflection plate. The adjustment device comprises a first driving mechanism, a first rotating member, a second driving mechanism and a second rotating member. The first rotating member and the second rotating member are coaxially arranged along a first rotating shaft, the first driving mechanism drives the first rotating member to rotate around the first rotating shaft, and the second driving mechanism drives the second rotating member to rotate around the first rotating shaft. When the adjustment device is in a first operating state, the first driving mechanism drives the first rotating member to rotate around the first rotating shaft in a first direction, the second driving mechanism drives the second rotating member to rotate around the first rotating shaft in a second direction, and the first direction is opposite to the second direction, such that clearances between structures can be eliminated, and the reflection plate is then stably and precisely kept in a preset position, thereby enhancing the stability and precision of the beam direction of the antenna.

The present invention is a system for providing accurate image-guided localization of a radiation target using digital image acquisition with real time data analysis utilizing a radiation device, directing a beam of radiation through a sample reflecting onto a film screen and reflecting an image from the film screen onto a mirror that will project the image from the mirror to a bean splitter where it is captured by a camera operatively associated with a computer device.

There is presented a system for outputting a plurality of electromagnetic, EM, radiation beams. The system is configured such that at least one of the EM radiation beams interacts with an atom of plurality of atoms of a neutral atom, quantum computer that is not interacted with by a second of the EM radiation beams; or, at least two of the EM radiation beams are for interacting with a respective different atom of a plurality of atoms neutral atom quantum computer. The plurality of atoms is for defining a respective plurality of qubits in a quantum computation performed by the neutral atom quantum computer. The system comprises one or more integrated-optic EM radiation source assemblies for generating at least first and second EM radiation and outputting said EM radiation along respective spatially separate output paths. The system comprises a plurality of integrated-optic EM modulator apparatus. At least a first of the integrated-optic EM modulator apparatus is for receiving the first EM radiation. At least a second of the integrated-optic EM modulator apparatus is for receiving the second EM radiation. The system comprises a plurality of output couplers. Each output coupler is for receiving, along a plane, EM radiation output from at least one of the integrated-optic modulator apparatus. Each output coupler is further for outputting the received EM radiation as an EM radiation beam in a direction either along the same plane or out of the plane.

The invention provides a radiation scanning detection device and method, and the device comprises a radiation source which is used for emitting a ray beam; the object carrying platform is used for loading an object to be measured, and the object carrying platform is arranged on the emergent side of the ray source; the detector comprises a plurality of receiving parts, the plurality of receiving parts are respectively configured to receive rays which are emitted from the ray source and pass through the object to be detected, the ray source and the detector are arranged on two sides of the loading platform in a first direction, and the plurality of receiving parts are arranged at intervals along a second direction perpendicular to the first direction; wherein the scanning area of the rays received by the plurality of receiving parts is an imaging area, the detector is movably arranged along a second direction so as to move the imaging area to the positions of different cutting groups covering the object to be detected, and the object carrying platform is rotatably arranged around a rotation axis parallel to the second direction so as to move the imaging area to the positions of different cutting groups covering the object to be detected. The problem that radiation scanning detection equipment in the existing security inspection field cannot detect tiny changes is solved.

A photoacoustic detector (100) is adapted to reveal the presence of a target compound in a gas to be analyzed (G). At least one radiation beam (F) is used during detector operation, entering a chamber (30) containing the gas to be analyzed and / or exiting said chamber at one or more locations, each adjacent to or superimposed on a pressure node of a standing acoustic wave (AC). The detector is compatible with configurations where the radiation beam passes through the chamber multiple times, and alignment of detector components can be simplified. The detector's sensitivity to external disturbances is also reduced. (Abstract figure: Figure 1)

A therapeutic apparatus may be provided. The therapeutic apparatus may include a radiation therapy device configured to apply therapeutic radiation to a region of interest (ROI). The radiation therapy device may include an accelerator configured to accelerate electrons in an electron beam to produce a radiation beam of the therapeutic radiation, a magnetic resonance imaging (MRI) device configured to acquire MRI data with respect to the ROI. The MRI device may include an annular cryostat including at least one annular structure enclosing one or more chambers.

A fluid handling system for a lithography system, comprising: a liquid supply configured to supply immersion fluid to fill at least a portion of the immersion space between a substrate and a projection system of a lithography system configured to project a patterned radiation beam onto the substrate; a gas supply configured to generate a gas jet containing a medium for restricting the immersion fluid within the immersion space; a discharge system configured to draw a two-phase fluid comprising a medium and immersion fluid, and having a gas phase and a liquid phase, into the discharge passage, and a recycling system configured to receive the two-phase fluid from the discharge passage and extract the medium from the two-phase fluid for further use as a product fluid.

Provided in the present application are an antenna, a communication device and a communication system. The antenna comprises a radome, a reflector plate and an adjustment device. The reflector plate and the adjustment device are arranged inside the radome to prevent impurities such as dust and moisture from damaging the adjustment device, thereby improving the reliability and stability of the adjustment device. The reflector plate is provided with a radiation unit array; and the adjustment device comprises a driving mechanism and a transmission mechanism, the transmission mechanism being connected between the driving mechanism and the reflector plate, the driving mechanism driving, by means of the transmission mechanism, the reflector plate to rotate around a first direction and a second direction, the first direction being perpendicular to the second direction, and the first direction and the second direction being respectively parallel to the reflector plate. The adjustment device adjusts the reflector plate to rotate around the first direction relative to the radome, thereby achieving the adjustment of the pitch angle of a radiation beam. The adjustment device adjusts the reflector plate to rotate around the second direction relative to the radome, thereby achieving the adjustment of the horizontal angle of the radiation beam emitted by the radiation unit array.

A CT device capable of easily and appropriately determining the start and end positions of imaging in helical scanning imaging is provided. [Solution] The CT apparatus is a helical scan type CT apparatus that continuously images an object being inspected while moving and rotating it, and includes an examination table 1 on which the object being inspected is placed and which moves and rotates the object being inspected, a radiation source 2 that irradiates the object being inspected with a radiation beam, a detector 3 that is provided opposite the radiation source 2 with the object being sandwiched between them, and an examination table position calculation unit 74 that calculates the position of the examination table 1 during imaging. The examination table position calculation unit 74 calculates a reconstruction start position Zs and a reconstruction end position Ze of the object being inspected, and calculates a data acquisition start position Zdas and a data acquisition end position Zdae based on the reconstruction start position Zs and the reconstruction end position Ze.

An electro-optical device (1) comprising a radiation unit (10) adapted to emit a radiation beam (11) having a peak emission wavelength in a range of 280-320 nm, a detection unit (20) adapted to detect a distance to a user and generate a detection signal based on the detection, and a radiation control unit (30) adapted to receive the detection signal and generate a control signal in response. The electro-optical device (1) is adapted to provide an irradiance in the range 0.003-0.5 mW / cm2 to the user.

The invention discloses a low-wind-load and damping vibration attenuation solar disc-type condensation system which comprises a condenser, a double-shaft tracking device, a main beam, a liquid amount adjusting system, a plurality of steel cables and the like. The condenser is composed of a steel framework, a plurality of mirror surface units, a covering body, a plurality of liquid storage bags and the like, wherein the steel framework is composed of a plurality of radiation beams and cross rods which are arrayed circumferentially; the mirror surface units are fixed on the steel framework; the covering body wraps the steel framework on the back of the condenser to form a streamline aerodynamic shape so as to reduce wind load, and only the reflecting surface of the mirror surface unit bears wind pressure, so that the wind load is effectively reduced; the mirror surface unit adopts a light high-rigidity structure with a light supporting back frame and an embedded bearing framework, so that the deformation of a reflecting element under wind pressure is reduced; the double-shaft tracking device is installed on the back of the condenser and is close to a pneumatic center to reduce the wind moment load. The liquid level of the liquid storage bag and the liquid storage box which is installed on the main beam and can move is adjusted, self-adaptive liquid damping energy dissipation and vibration reduction of the light condensation system under the wind disturbance effect are achieved, and the service optical precision is improved.

A system for characterizing an effluent sample from a patient receiving peritoneal dialysis is provided. The system is equipped with a container (30) for accommodating an effluent sample, an optical system, an electrical system and a processor (13). The optical system is equipped with a light source (18, 24) and a photodetector (14, 54), the light source emitting a beam of radiation passing through the container and illuminating the effluent sample, and the photodetector detecting the radiation after illuminating the effluent sample to generate a light signal. The electrical system is equipped with at least one pair of electrodes (38a, 38b) attached to the container and arranged to measure an electrical characteristic of the effluent sample to generate a characteristic signal. The processor runs an algorithm that comprehensively processes the light signal and the characteristic signal to characterize the effluent sample.

A polarizer system is described. The polarizer system comprises at least one polarization beam splitter, a polarization rotator, and a beam combiner. The at least one polarization beam splitter is positioned to receive input radiation beam and to split the input radiation beam directing a first beam portion having a first linear polarization orientation along a first path and a second beam portion having a second linear polarization orientation orthogonal to said first linear polarization orientation along a second path. The polarization rotator is located along said second path and configured to rotate polarization of said beam portion to be parallel to said first linear polarization orientation. The beam combiner is configured and positioned to combine said first and second beam portions to form a common beam having said first linear polarization orientation propagating along a selected optical path.

Apparatuses and methods of X-ray fluorescence (XRF) imaging use a radiation source to stimulate XRF from only a slice of an object by projecting a radiation beam through only the slice. An X-ray detector having a plurality of pixels is provided. A collimator having a plurality of parallel collimator plates is positioned between the object and the X-ray detector. The radiation beam is not parallel to the collimator plates. Neighboring pairs of the collimator plates allow XRF from only respective portions of the slice to reach respective subsets of the pixels. For each of the respective pixel subsets the X-ray detector sums signals generated in the pixel or pixels of the respective subset. The radiation beam is a fan beam or a pencil beam. A pixel pitch of the X-ray detector is an integer multiple of a plate pitch of the collimator.

A removable image-capture apparatus (200) comprises an opening (202) intended to receive a calibration plate (10) bearing a reference marking (30) and possibly a test marking (40). The apparatus (200) comprises a source (204) of backlighting visible light situated beneath the opening (202), a sensor (205) for acquiring an image, in the backlighting visible light, of the plate (10), a guiding and supporting device (206) for positioning the sensor (205) above the opening (202) relative to the surround (201), a calculation device (207) configured to analyze the image, recognize the marking (30) and possibly the marking (40) in the image, and calculate aiming-command corrections intended for a firing system firing a powerful incident-radiation beam, which system belongs to an additive manufacturing apparatus, distinct and separate from the apparatus (200).

The present application relates to the technical field of antennas, and in particular to an antenna unit, a base station antenna, and a communication device. The antenna unit can be widely applied to various base station antennas, including active and passive antenna systems. The antenna unit comprises an excitation unit, a metasurface radiation structure and a reflecting surface, wherein the metasurface radiation structure and the reflecting surface are spaced apart oppositely, the excitation unit is used for exciting the metasurface radiation structure to radiate an electromagnetic signal, the reflecting surface is used for reflecting the signal radiated by the metasurface radiation structure, and the distance between the metasurface radiation structure and the reflecting surface varies in a first direction. The direction of a radiation beam can be changed to achieve deflection of the radiation beam.

A method for determining at least one height of a surface of an object comprises projecting a patterned radiation beam onto an object so as to form an image of a pattern. The image of the pattern comprises first and second portions, each of the first and second portions comprising at least one line, wherein at least one line of the first portion is disposed at a non-zero angle to at least one line of the second portion. The method further comprises receiving a portion of the patterned radiation beam reflected from the substrate. The method further comprises determining at least one height from a combination of: (a) a part of the received portion of the patterned radiation beam reflected from the first portion of the pattern; and (b) a part of the received portion of the patterned radiation beam reflected from the second portion of the pattern.

An optical alignment system including an illumination system configured to condition a radiation beam to form a first off-axis monopole, a marker configured to diffract the first off-axis monopole to form zeroth and first diffraction orders, a projection system configured to collect the zeroth and first diffraction orders and form an image of the marker, and a sensor apparatus configured to detect the image of the marker.

The embodiment of the present application discloses a magnetic resonance image guided radiotherapy system. The magnetic resonance image guided radiotherapy system comprises a radiotherapy device, the radiotherapy device comprises a treatment head; a magnetic resonance imaging device, the magnetic resonance imaging device comprises a main body, the main body is provided with a superconducting magnet adopting a liquid-helium-free conduction cooling technology and a through hole communicating the inner wall and the outer wall of the main body; the treatment head is at least partially arranged in the through hole and is used for emitting a radiation beam to the internal cavity of the main body to perform radiotherapy.