451 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.

The present relates to device for ultra-high dose rate radiation treatment to a patient, comprising: —a radiation source for providing a radiation beam, and—a linear accelerator for accelerating said radiation beam until a predetermined energy, and—a beam delivery module for delivery the accelerated radiation beam. The device is arranged for generating an accelerated radiation beam having a predetermined energy between about 50 MeV and about 250 MeV, to deliver rate radiation dose of at least 10 Gy, during an overall time less than about 200 ms in order to generate a radiation field for treating a target volume of at least about 30 cm3, with said ultra-high dose rate radiation dose and / or a target volume located at least about 5 cm deep in the tissue of the patient with said ultra-high dose rate radiation dose.

The invention provides a composite collimator and a control method thereof, a radiotherapy system and a dose delivery method thereof, and relates to the technical field of radiotherapy, and the composite collimator comprises a grating and a diaphragm which are sequentially arranged in the direction of a beam center axis, the plurality of blades move to form a grating channel through which a radiation beam can pass; the diaphragm is provided with a collimation channel, and the diaphragm can move relative to a beam center axis; when the diaphragm moves to enable the collimation channel to be located at the central axis of the beam, the radiation beam forms a focusing radiation field in a target area through the grating channel and the collimation channel; and when the diaphragm moves to enable the collimation channel to deviate from the beam center axis, the radiation beam forms a conformal radiation field in the target area through the grating channel. Through switching between the conformal radiation field and the focusing radiation field, a flexible irradiation scheme is provided, so that the dose distribution effect can be improved, and the radiotherapy effect is improved.

Provided herein is technology relating to medical imaging and radiation therapy and particularly, but not exclusively, to devices, methods, and systems for positioning a patient with respect to a radiation source to image the patient and / or to treat the patient by exposing the patient to a radiation beam produced by the radiation source.

A system includes a radiation source and a phased array. The phased array includes optical elements, waveguides and phase modulators. The phased array generates a beam of radiation. The optical elements radiate radiation waves. The waveguides guide radiation from the radiation source to the optical elements. The phase modulators adjust phases of the radiation waves such that the radiation waves accumulate to form the beam. An amount of incoherence of the beam is based on randomization of the phases.

A fluid treatment system includes: a liquid confinement structure configured to confine an immersion liquid to a space between at least a portion of the liquid confinement structure and a surface of a substrate, the liquid confinement structure having an aperture forming a passage therein for passage of a radiation beam to irradiate the surface of the substrate by passing through the immersion liquid; and a diagnostic tool configured to detect an abnormal condition in the fluid treatment system, the diagnostic tool comprising an acoustic system configured to measure acoustic characteristics of the liquid confinement structure and / or the immersion liquid, where the acoustic system comprises a transducer configured to emit an acoustic detection signal to and / or receive acoustic waves from the immersion liquid.

Systems, apparatuses, and methods are provided for detecting a particle on a substrate surface. An example method can include receiving, by a grating structure, coherent radiation from a radiation source. The method can further include generating, by the grating structure, a focused coherent radiation beam based on the coherent radiation. The method can further include transmitting, by the grating structure, the focused coherent radiation beam toward a region of a surface of a substrate. The method can further include receiving, by the grating structure, photons scattered from the region in response to illuminating the region with the focused coherent radiation beam. The method can further include measuring, by a photodetector, the photons received by the grating structure. The method can further include generating, by the photodetector and based on the measured photons, an electronic signal for detecting a particle located in the region of the surface of the substrate.

The invention provides a foldable electronic device. The foldable electronic device comprises an antenna. The working frequency band of the antenna comprises a satellite communication frequency band. The antenna comprises a radiator and a parasitic branch. A part of the conductive frame of the housing is used as a radiator and a parasitic branch. When the foldable electronic device is in an unfolded state, the radiator and the parasitic branch can generate radiation beams facing the two sides of the top of the foldable electronic device, so that the antenna has a wide beam characteristic. When the foldable electronic device is in the unfolded state, a user does not need to change the posture of holding the foldable electronic device during satellite communication, and the experience of the user during satellite communication can be improved.

The invention discloses a mounting method and a dismounting method for a construction platform in a silo. The mounting method comprises the following steps: digging an embedding hole in the top of a silo wall, and mounting a steel corbel; a steel truss platform assembly is installed on a bottom plate of the silo; the steel truss platform assembly is integrally suspended and lifted by connecting a tower crane with a sling, and a bracket is mounted at the lower end of a beam column on a bottom plate; continuing to integrally suspend and lift, and mounting a standard knot at the lower end of the bracket on the bottom plate; integrally suspending and lifting once repeatedly, and installing a standard knot; the steel truss platform assembly is lifted to the preset elevation position of the top of the silo, a hydraulic oil cylinder is controlled to stretch out and draw back to rotate the steel truss platform assembly on the horizontal plane, so that the radiation beams of the steel truss platform are aligned to the embedding holes in the silo wall and are inserted and installed through bolts, and the lower end of a center stand column is fixed to a bottom plate; and removing the sling. According to the invention, the installation difficulty is reduced, the installation efficiency and convenience are improved, the construction safety is guaranteed, and the safety risks of high-altitude falling and object falling are avoided.

The invention provides a radiation imaging apparatus. The apparatus comprises: a radiation source configured to emit a radiation beam; a detector configured to receive a radiation beam from the radiation source, the radiation source and the detector defining an inspection channel; and at least one grating disposed on the inspection channel between the radiation source and the detector. The at least one grating is in the form of a cambered surface, or in the form of a groove-shaped surface having a plurality of angled planar segments, the cambered surface or groove-shaped surface facing the radiation source.

The invention provides a static CT (Computed Tomography) device. The apparatus comprises one or more sets of inspection components, each set comprising: a multipoint distributed source configured to emit a beam of radiation; a detector facing the multi-point distributed source so as to receive a radiation beam emitted by the multi-point distributed source, the multi-point distributed source and the detector defining an inspection channel; and a grating disposed on the inspection channel between the multipoint distributed source and the detector. The grating has a periodic structure configured to diffract a radiation beam passing through the grating to form an interference pattern. The invention further provides a CT examination method.

The invention discloses a Janus transflective array antenna based on a beam deflection theory, and relates to the field of electromagnetism, in particular to the technical field of microwave radio frequency. The positions of the top patch and the bottom patch are adjusted through the adjusting unit, so that the PB phase can cover the 360-degree phase. When linear polarization is incident in the forward direction, independent and adjustable left-hand circularly polarized wave beams can be generated in a transmission space and a reflection space at the same time, the function of a transflective array antenna is shown, when linear polarization is incident in the backward direction, right-hand circularly polarized wave beams can be generated only in the transmission space, and radiation wave beams can be generated in the forward direction and the backward direction, which is the function of a Janus antenna.

The invention provides radiation imaging equipment, CT imaging equipment, a radiation imaging method and a CT imaging method. A radiation imaging device includes a radiation source, a detector, and at least one grating disposed between an inspection channel defined by the radiation source and the detector between the radiation source and the detector. And the grating only shields one part of the radiation beam, so that one part of the radiation beam passes through the grating and then is received by the detector.

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.

An illumination correction apparatus for correcting a radiation beam incident on a reticle from an exposure apparatus includes a plurality of fingers each having a surface facing an incident direction of the radiation beam, the plurality of fingers being arranged in a first direction to be adjacent to a path of the radiation beam, and configured to adjust an amount of the incident radiation beam by moving in a second direction, intersecting the first direction, a controller connected to the plurality of fingers and configured to control movement of the plurality of fingers such that an intensity of the radiation beam has uniformity in the first direction, at least one optical sensor on the surface of at least one finger of the plurality of fingers, and a measurement unit configured to measure, based on an output of the at least one optical sensor, the intensity of the radiation beam.

Provided in the present application are a foldable electronic device, the foldable electronic device comprising an antenna. The operating frequency band of the antenna comprises a satellite communication frequency band. The antenna comprises a radiator and a parasitic stub. Part of a conductive frame of a shell serves as the radiator and the parasitic stub. When the foldable electronic device is in an unfolded state, the radiator and the parasitic stub can generate radiation beams towards two sides of the top of the foldable electronic device, so that the antenna has the characteristics of a wide beam. When the foldable electronic device is in the unfolded state, a user does not need to change the posture of holding the foldable electronic device when performing satellite communication, so that the experience of the user during performing satellite communication can be improved.

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 present disclosure relates to target expansion rate control in an extreme ultraviolet light source. A method includes: providing a target material, the target material including a component that emits extreme ultraviolet (EUV) light when converted to plasma; directing a first radiation beam toward the target material to transfer energy to the target material to modify the geometric distribution of the target material to form a modified target; directing a second radiation beam toward the modified target, the second radiation beam converting at least a portion of the modified target into a plasma that emits EUV light; measuring one or more characteristics associated with one or more of the target material and the modified target relative to the first radiation beam; and controlling the radiation exposure delivered from the first radiation beam to the target material within a predetermined energy range based on the measured one or more characteristics.

The present disclosure is directed to a radiation therapy system. The radiation therapy system may comprise a magnetic resonance imaging (MRI) apparatus configured to acquire MRI data with respect to a region of interest (ROI) of a subject, the MRI apparatus including a magnetic body; and a radiation therapy apparatus configured to apply a radiation beam to at least one portion of the ROI. The radiation therapy apparatus may include a linear accelerator configured to accelerate electrons to produce the radiation beam, the linear accelerator being located in a bore formed by an inner surface of the magnetic body, and a length direction of the linear accelerator being parallel with an axis of the magnetic body.

An apparatus for use in a metrology apparatus comprises: selection optics; and a plurality of beam-modifying modules. The selection optics is arranged to receive an input radiation beam and is configurable so as direct the radiation beam to any one of the plurality of beam-modifying modules. Each of the plurality of beam-modifying modules is arranged to control the same at least one attribute of the radiation beam (for example wavelength, polarization, size, shape etc.). The selection optics may be arranged to receive secondary radiation output by any one of the plurality of beam-modifying modules and may be configurable so as direct the secondary radiation received from any one of the plurality of beam-modifying modules to a common output. A timescale for switching between two configurations of any one of the beam-modifying module may be larger than a timescale for switching between two configurations of the selection optics.

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.

A system for high-contrast, real-time analysis of a sample includes: a first radiation source configured to emit a first radiation beam onto the sample, wherein the first radiation beam comprises pulsed infrared (IR) light; a second radiation source configured to emit a second radiation beam onto the sample, wherein the second radiation beam comprises ultraviolet (UV) light, visible-spectrum light, or near-IR light; an imager configured to split the second radiation beam into a test field and a reference field; a pixelated phase mask (PPM) configured to introduce a predetermined phase shift between the test field and the reference field; an imaging sensor configured to detect the test field and the reference field and output an electrical signal indicating optical intensities of the test field and the reference field; and processing circuitry configured to generate imagery of the sample based on the electrical signal and the predetermined phase shift.

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.

Described herein are methods for beam station delivery of radiation treatment, where the patient platform is moved to a series of discrete patient platform locations or beam stations that are determined during treatment planning, stopped at each of these locations while the radiation source rotates about the patient delivering radiation to the target regions that intersect the radiation beam path, and then moving to the next location after the prescribed dose of radiation (e.g., in accordance with a calculated fluence map) for that location has been delivered to the patient.

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).