621 results about "Radiation beam" patented technology

A system includes a radiation source, an optical system, an optical element, a detection system, and a processor. The radiation source is configured to generate a radiation beam. The optical system is configured to direct the radiation beam toward a target structure and to receive the scattered radiation. The target structure is configured to produce scattered radiation comprising one or more scattered beams. The optical element is configured to control a position of the one or more scattered beams. The detection system is configured to receive a portion of the position-controlled scattered radiation and to generate a detection signal. The processor is configured to determine a property of the target structure based on at least the detection signal.

The embodiment of the invention provides a radiation device. The radiation device comprises a rotatable assembly which can rotate around a rotation axis; the beam assembly is arranged on the rotatable assembly, the beam assembly comprises a plurality of beam modules, each beam module is used for emitting a radiation beam, and the plurality of beam modules are arranged at intervals along the circumferential direction of the rotatable assembly; and the power divider is arranged on the rotatable assembly, the power divider is provided with a plurality of power distribution ports, the plurality of power distribution ports are respectively connected with the plurality of beam modules, and the beam modules and the power divider can rotate around the rotation axis along with the rotatable assembly.

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.

Described herein are systems and methods for positioning a radiation source with respect to one or more regions of interest in a coordinate system. Such systems and methods may be used in emission guided radiation therapy (EGRT) for the localized delivery of radiation to one or more patient tumor regions. These systems comprise a gantry movable about a patient area, where a plurality of positron emission detectors, a radiation source are arranged movably on the gantry, and a controller. The controller is configured to identify a coincident positron annihilation emission path and to position the radiation source to apply a radiation beam along the identified emission path. The systems and methods described herein can be used alone or in conjunction with surgery, chemotherapy, and / or brachytherapy for the treatment of tumors.

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.

The invention relates to the technical field of silo grain storage engineering, and particularly discloses a construction process of a conical silo top of a large-diameter squat silo, which comprises the following steps: step 1, lifting a steel truss to a height not lower than the mounting position of a bracket, and then fixedly mounting the bracket on an embedded threaded pipe on a silo wall; secondly, a supporting plate of the bracket is fixedly connected with a stress plate fixed to the radiation beam through a bolt; wherein a plurality of mounting holes are formed in the supporting plate of the bracket, a plurality of matching holes are formed in the stress plate, fixed connection is achieved by inserting bolts into the mounting holes and the matching holes, and the mounting holes and / or the lap joint holes are adjusting holes. And thirdly, formworks are installed on the steel trusses, steel bars are bundled, then the silo top is poured, and during pouring, according to the principle of first bottom and then top, the lower ring beam connected with the silo wall is poured firstly, then the conical shell is poured, and finally the center of the silo top is poured. The scheme is used for solving the problems that disassembly is time-consuming and secondary utilization is affected due to welding of the steel truss and the bracket at present.

An optical alignment method includes providing an emitted radiation beam which includes a first peak wavelength and a second peak wavelength to a chromatic aberration enhancement component which increases a chromatic aberration of the emitted radiation beam, providing a first incident radiation beam having the first peak wavelength and a second incident radiation beam having the second peak wavelength which is shorter than the first peak wavelength to respective first and second alignment marks located at different vertical levels in a device under test, detecting reflected radiation from the first and second alignment marks, and using the detected reflected radiation for optical alignment of layers in the device under test.

The present disclosure provides a calibration device for an ultrahigh dose rate radiation device, the ultrahigh dose rate radiation device comprising a plurality of beam modules for emitting a plurality of radiation beams, the calibration device comprising: a calibration target assembly comprising a target portion, the target part is located in a preset radiation area of the ultrahigh dose rate radiation device in the calibration process; wherein the target part is used as a reference to calibrate the intersection deviation of the plurality of radiation beams in the predetermined radiation area. The invention also provides a calibration method and an ultrahigh dose rate radiation device.

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.

A wearable electronic device (1), having a first radiation source (10) configured to emit a radiation beam (11) to a surface of skin of a user, the radiation beam having a peak emission wavelength between 610-1400nm; a driver circuit (20) configured to provide a driving current (15) to the radiation source (10) to control an irradiation intensity of the radiation beam on said surface; and an antenna (40) and / or a sensor circuit (30) having one or more sensors. The driver circuit (20) is configured to receive one or more inputs from the sensor circuit (30) and / or from the antenna (40) and is configured to control the first radiation source (10) on the basis of said one or more inputs.

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 present invention relates to a cargo inspection system. The cargo inspection system scans a cargo using a radiation beam. The cargo inspection system comprises a gateway having at least one radiation source at one side and at least one radiation detector at another side, and an image processing module. The image processing module is configured to generate one or more images based on image frames of a captured radiation, and to discriminate material in the X-ray imaging of the cargo inspection. The image processing module comprises at least one central processing unit or CPU connected to at least one graphics processing unit or GPU.

The invention provides an ultrahigh dose rate radiation method, which comprises the following steps: controlling a plurality of beam modules to be positioned at a plurality of target positions in a one-to-one correspondence manner so as to form different radiation angles relative to the same target part; and under the condition that a to-be-radiated area of a target object is located at the target part, the beam modules are controlled to alternately emit multiple radiation beams to the target part from the different radiation angles, and each radiation beam in the multiple radiation beams has an ultrahigh dose rate. The invention further provides an ultrahigh dose rate radiation device.

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 belongs to the field of millimeter wave point-to-point communication, and particularly relates to a broadband fixed-beam leaky-wave antenna with a filtering characteristic. The substrate integrated coaxial line transmission structure is adopted to feed the two ends of the leaky-wave structure, and the substrate integrated coaxial line transmits quasi-TEM waves and has a very weak dispersion characteristic, and the phase constant beta of the quasi-TEM waves changes slightly in a wide frequency band range, so that a fixed radiation wave beam can be obtained in a certain frequency band range; inversion signals are fed at the two ends of the leaky-wave structure so that the two wave beams can form a main wave beam, when the two wave beams deviate from the broadside to radiate by a certain angle, a wave beam with good radiation can still be formed, and therefore the bandwidth corresponding to the fixed radiation wave beam is further widened. On the basis, a plurality of radiation matching units are sequentially arranged on the metal strip in the length direction of the metal strip, so that the fixed-beam leaky-wave antenna has the characteristics that the angle of a radiation beam is kept unchanged in a relatively wide bandwidth, the gain is high, the efficiency is high and the side lobe is low.

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.