134 results about "High-energy X-rays" patented technology

A system for spectroscopic imaging of bodily tissue in which a scintillation screen and a charged coupled device (CCD) are used to accurately image selected tissue. Applications include the imaging of radionuclide distributions within the human body or the use of a dual energy source to provide a dual photon bone densitometry apparatus that uses stationary or scanning acquisition techniques. An x-ray source generates x-rays which pass through a region of a subject's body, forming an x-ray image which reaches the scintillation screen. The scintillation screen reradiates a spatial intensity pattern corresponding to the image, the pattern being detected by a CCD sensor. The image is digitized by the sensor and processed by a controller before being stored as an electronic image. A dual energy x-ray source that delivers two different energy levels provides quantitative information regarding the object being imaged using dual photon absorptiometry techniques. Dual scintillation screens can be used to simultaneously generate images of low-energy and high-energy x-ray patterns. Each image is directed onto an associated respective CCD or amorphous silicon detector to generate individual electronic representations of the separate images.

A calibrated real-time, high energy X-ray imaging system is disclosed which incorporates a direct radiation conversion, X-ray imaging camera and a high speed image processing module. The high energy imaging camera utilizes a Cd—Te or a Cd—Zn—Te direct conversion detector substrate. The image processor includes a software driven calibration module that uses an algorithm to analyze time dependent raw digital pixel data to provide a time related series of correction factors for each pixel in an image frame. Additionally, the image processor includes a high speed image frame processing module capable of generating image frames at frame readout rates of greater than ten frames per second to over 100 frames per second. The image processor can provide normalized image frames in real-time or can accumulate static frame data for substantially very long periods of time without the typical concomitant degradation of the signal-to-noise ratio.

The application discloses systems and methods for X-ray scanning for identifying material composition of an object being scanned. The system includes at least one X-ray source for projecting an X-ray beam on the object, where at least a portion of the projected X-ray beam is transmitted through the object, and an array of detectors for measuring energy spectra of the transmitted X-rays. The measured energy spectra are used to determine atomic number of the object for identifying the material composition of the object. The X-ray scanning system may also have an array of collimated high energy backscattered X-ray detectors for measuring the energy spectrum of X-rays scattered by the object at an angle greater than 90 degrees, where the measured energy spectrum is used in conjunction with the transmission energy spectrum to determine atomic numbers of the object for identifying the material composition of the object.

A multi-energy imaging system and method for selectively generating high-energy X-rays and low-energy X-ray beams are described. A pair of optic devices are used, one optic device being formed to emit high X-ray energies and the other optic device being formed to emit low X-ray energies. A selective filtering mechanism is used to filter the high X-ray energies from the low X-ray energies. The optic devices have at least a first solid phase layer having a first index of refraction with a first photon transmission property and a second solid phase layer having a second index of refraction with a second photon transmission property. The first and second layers are conformal to each other.

A scanning system and methods for inspecting contents of a container. High-energy penetrating radiation collimated into a fan beam illuminates an inspected container from one side, while a plurality of detector plates are disposed on the opposite side of the container. Each detector plate has a plurality of detector modules, each of which, in turn, is disposed on a remotely activated alignment and has multiple detector elements. A controller governs the orientation of each of the plurality of detector plates based at least on the detector signal generated by its detector elements such that each detector element of each detector module of each detector plate may be aligned to within a specified fraction of the transverse dimension of the fan beam as measured at the exit slot.

A scintillated CCD detector system for imaging x rays uses x-rays having a photon energy in the range of 1 to 20 keV. The detector differs from existing systems in that it provides extremely high resolution of better than a micrometer, and high detection quantum efficiency of up to 95%. The design of this detector also allows it to function as an energy filter to remove high-energy x-rays. This detector is useful in a wide range of applications including x-ray imaging, spectroscopy, and diffraction. The scintillator optical system has scintillator material with a lens system for collecting the light that is generated in the scintillator material. A substrate is used for spacing the scintillator material from the lens system.

The invention provides a composite shielding material for shielding medical X-ray, which insists of ray absorbing material and carrier material, wherein, the ray absorbing material comprises mixing lanthanide, tungsten, bismuth, tin and / or antimony, the lanthanide which is extracted from natural ore can be oxide or formalization compound thereof, the tungsten, bismuth, tin and / or antimony can be metal power thereof, also can be formalization compound thereof. The carrier material can be natural rubber or artificial rubber, thermoplastic elastomer, as well as plastic. The composite shielding material for shielding medical X-ray provide by the invention has the advantages of good shielding performance, light weight, non-poisonous, no pollution, low cost and so on, not only overcomes defects of using single element barium or bismuth, but also overcomes defects that the lead equivalent is reduced when absorbing low and high energy X-ray in the lanthanide adding with tungsten technology.

An X-ray treatment apparatus comprises a low energy X-ray generator for detecting a marker, a marker sensor detecting a position of the marker fixed in the patient to a couch, and both low energy X-ray generator and the marker sensor are installed in the couch, a high energy X-ray generator for treatment, a X-ray sensor for treatment detecting the high energy X-ray for treatment. An X-ray treatment method using the X-ray treatment apparatus comprises the steps of detecting a position of a marker by the marker sensor, irradiating to a lesion the high energy X-ray for treatment, detecting the penetrated high energy X-ray for treatment by the X-ray sensor for treatment, modifying the beam profile, the dosage or / and the radiation direction of the X-ray for treatment according to the latest data of the sensors, performing the next radiation for the lesion.

The invention discloses a high-energy X-ray radiographic film changing robot, and relates to the technical field of high-energy X-ray nondestructive testing. The high-energy X-ray radiographic film changing robot comprises a movable vehicle, an openable screen film library, a mechanical gripper, movement mechanisms of the mechanical gripper and an electric control cabinet, and mechanical transmission, electric control, hydraulic control, pneumatic control and PLC (programmable logic control) functions are integrated in a system. Film holders are remotely and automatically switched by the system via a manual teaching technology, a remote control technology, an automatic zero calibration technology, a film library ray screen structure optimization design technology and an industrial robot technology. A plurality of industrial X-ray film holders can be stored at one step by the aid of the robot, films in the film holders can be effectively screened, and a series of automatic film changing actions such as grabbing the film holders and spatially positioning the film holders can be automatically completed under remote instruction operation actions according to an artificially taught movement track. The high-energy X-ray radiographic film changing robot has the advantages that the robot can replace operators to reliably and automatically switch the films under a high-energy X-ray condition, and the work efficiency is greatly improved.

An optical transceiver is provided for optical communications with additive noise compensation. The system and method are disclosed for the additive noise cancellation, which is typically a vibration noise, caused by moving platform, where the transceiver is located. The transceiver comprises an additive noise sensor and a digital signal processing (DSP) unit which implements variable step size technique to adjust the filter weight in the least square estimate of the noise signal. In the preferred embodiment the digital signal processing is applied both at the transmission and the receiving side. The optical device is packed for ground-satellite and inter-satellite communications applications with resistance to high-energy X-rays, gamma rays and cosmic rays. The optical device sustains its operation characteristics under launch load.

The invention relates to the field of material structure research and performance in-situ test, and specifically relates to a synchronous radiation X-ray diffraction in-situ stretching device and an application method thereof. The device comprises three main components of a loader, a driver, and a fixing support. The loader is mainly manufactured by using high-strength aluminum alloy or titanium alloy, and comprises a pedestal, a load driving part, a load transmission part, a sample fixture part, a stretch sensor part, and a slide guide rail part. The driver is an integration of a data collection card and a motor driver, and is independent from the loader. The fixing support is manufactured from high-strength aluminum alloy, and has a detachable interface on the lower part. The device is designed based on an X-ray reflective optical path principle. Sample loading fixture and load sensor heights satisfy requirements. The device can be effectively applied in in-situ microstructure and performance integral tests. With the device, a dynamic process of stress and strain distribution of various phases of a material can be subjected to in-situ observation by using high-energy X-rays, and material mechanical performance mechanism can be analyzed on a micro-phase size.

The back scatter detector is one truncated rectangular pyramid structure comprising one bottom plane, one top plane and four side planes to form one sealed casing. The bottom plane as the X-ray incident window has outer layer of aluminum-plastic board and inner layer of barium fluorochloride screen; and the top plane and the four side planes have transparent flash cesium iodide crystal sheets adhered to the inner surface and mounted photomultipliers. The present invention has barium fluorochloride layer to absorb low energy X-rays and transparent cesium iodide crystal sheets to absorb high energy X-rays, and this can greatly reduce afterglow, raise the X-ray absorbing efficiency and raise light converting efficiency.

A rigid patient support element that is substantially transparent to high energy x-radiation comprising a structural core and one or more perforated face sheets attached to at least one of the top side or bottom side of the element. The support element reduces Compton scattering thereby reducing patient skin damage. The support element of the present invention can be integrated into a patient support surface, used as an insert or used as a spacer and easily removable from a patient support surface.

Disclosed are a method and a device for real-time mark for a high-energy X-ray dual-energy imaging container inspection system in the radiation imaging field. The method comprises the steps of emitting a first main beam of rays and a first auxiliary beam of rays having a first energy, and a second main beam of rays and a second auxiliary beam of rays having a second energy; causing the first and second main beams of rays transmitting through the article to be inspected; causing the first and second auxiliary beams of rays transmitting through at least one real-time mark material block; collecting values of the first and second main beams of rays that have transmitted through the article to be inspected as dual-energy data; collecting values of the first and second auxiliary beams of rays that have transmitted through the real-time mark material block as adjustment parameters; adjusting the set of classification parameters based on the adjustment parameters; and identifying the substance according to the dual-energy data based on adjusted classification parameters. The method according to the invention simplifies the mark procedure for a substance identification subsystem in a high-energy dual-energy system while improves the stability of the material differentiation result of the system.

The application discloses systems and methods for X-ray scanning for identifying material composition of an object being scanned. The system includes at least one X-ray source for projecting an X-ray beam on the object, where at least a portion of the projected X-ray beam is transmitted through the object, and an array of detectors for measuring energy spectra of the transmitted X-rays. The measured energy spectra are used to determine atomic number of the object for identifying the material composition of the object. The X-ray scanning system may also have an array of collimated high energy backscattered X-ray detectors for measuring the energy spectrum of X-rays scattered by the object at an angle greater than 90 degrees, where the measured energy spectrum is used in conjunction with the transmission energy spectrum to determine atomic numbers of the object for identifying the material composition of the object.

A device for sorting contaminants from minerals includes a mineral feeding arrangement configured to feed minerals to an elongated chute member configured thereto in an inclined position for enabling free falling of the minerals in a detection zone. The device further includes an X-ray generating member to generate at least two collimated X-rays, low and high collimated x-rays, such that the collimated X- rays passes from the free falling minerals in the detection zone for being partially absorbed thereby.; The device further includes a multi-energy X-rays sensors array to sense residual low and high energy X-rays and send a signal data to an electronic module to generate a comparative valve for determining the contaminants from the free falling minerals to be sorted based on a stored threshold valve, and send a process signal to a manifold arrangement having a plurality of ejectors to generate pneumatic-pressure for sorting contaminants from minerals.

The invention discloses a high-resolution X-ray energy spectrometer based on an Si-PIN detector array. Detectors of the energy spectrometer employ an m row*n column Si-PIN detector array, each row of the detectors share one charge sensitive amplifier, there are n columns all together, X rays detected by the detectors are respectively sent to a time discrimination unit and a signal filtering weighting unit through amplification of the amplifiers, and n time signals and single-path energy signals are formed. Inside a digital multichannel pulse-amplitude analyzer, accurate pulse amplitude is extracted after the time signals and the energy signals are processed by an offline correction module and a trapezoid shaping module, and an energy spectrum of the X rays is finally output. The high-resolution X-ray energy spectrometer has the following advantages: the detection efficiency of the detectors in detecting the X rays especially high-energy X rays is improved, the problem of introduction of quite large noise during application of the detector array under common conditions is solved, the signal-to-noise ratio is improved, and the energy resolution of the X-ray energy spectrometer is effectively improved.

An X-ray image acquisition apparatus includes a panel having a first electrode, a second electrode, and a photoconductor secured between said first and second electrodes. The photoconductor has a thickness configured to absorb X-ray radiation at a high energy level. The first and second electrodes are configured to create an electric field for transporting charges created in the photoconductor to a pixel unit, thereby allowing charges to be efficiently collected when low or high energy X-ray radiation is used.

A system for collecting information from a sample, the system includes an X-ray detector configured to mount to an electron microscope, the X-ray detector including a detection tip with a detection material positioned in the detection tip. The detection material includes a compound semiconductor material.

A RF linear electron accelerator system for generating a beam of accelerated electrons bunched in pulses having different energy spectra from pulse to pulse. The system is operable to generate a beam of high energy X-rays from such beam of accelerated electrons, using a conversion target, with pulses of the X-ray beam having energy spectra which are different from X-ray pulse to X-ray pulse. Preferably, the pulses of the electron beam have energy spectra which alternate from pulse to pulse and, correspondingly, the pulses of the X-ray beam have energy spectra which alternate from pulse to pulse. Also preferably, the current of electrons injected into the system's accelerating section and the frequency of the pulse RF power supplied to the accelerating section are changed in a synchronized manner to generate the electron beam. The system is employable in an inspection system for discriminating materials present in containers by atomic numbers.

A system for spectroscopic imaging of bodily tissue in which a scintillation screen and a charged coupled device (CCD) are used to accurately image selected tissue. Applications include the imaging of radionuclide distributions within the human body or the use of a dual energy source to provide a dual photon bone densitometry apparatus that uses stationary or scanning acquisition techniques. An x-ray source generates x-rays which pass through a region of a subject's body, forming an x-ray image which reaches the scintillation screen. The scintillation screen reradiates a spatial intensity pattern corresponding to the image, the pattern being detected by a CCD sensor. The image is digitized by the sensor and processed by a controller before being stored as an electronic image. A dual energy x-ray source that delivers two different energy levels provides quantitative information regarding the object being imaged using dual photon absorptiometry techniques. Dual scintillation screens can be used to simultaneously generate images of low-energy and high-energy x-ray patterns. Each image is directed onto an associated respective CCD or amorphous silicon detector to generate individual electronic representations of the separate images.

The invention relates to the technical field of material testing and particularly relates to a high-frequency in-situ imaging fatigue tester. The tester comprises a tester body, a test sample clampingmechanism, a preset force loading mechanism and a voice coil motor, wherein the test sample clamping mechanism is used for clamping and fixing a test sample, and the test sample clamping mechanism comprises a first clamping assembly and a second clamping assembly which are arranged oppositely; the preset force loading mechanism is arranged at one side of the first clamping assembly of the test sample clamping mechanism and is used for applying preset tension and pressure to the test sample; and the voice coil motor is fixedly connected to the tester body, and a moving shaft of the voice coilmotor is connected to the second clamping assembly. The voice coil motor is utilized for realizing high-frequency actuation to perform high-frequency fatigue on the test sample, and high-energy X-raysare utilized for performing three-dimensional imaging on fatigue damage inside materials, thereby researching the high-cycle and even ultra-high-cycle fatigue failure mechanism of the materials.

The invention discloses a method and a system for detecting material defects based on photonuclear reaction. The method comprises the following steps: scanning a detected material by a high-energy X-ray, wherein, the high-energy X-ray and target nuclide in the detected material can perform photonuclear reaction so as to generate positive electrons in the detected material; measuring Gamma-photon energy caused by annihilation of the positive electrons by utilizing a detector so as to obtain Gamma-photon energy spectrum broadening; and analyzing the Gamma-photon energy spectrum broadening so as to judge the defect situation of the detected material. In the method, the high-energy X-ray and the nuclide in the detected material perform photonuclear reaction so as to generate a positive electron source in the detected material, so that the problem that an external positive electron source can not detect the interior of the material can be solved.

The invention relates to a nondestructive detection device for the high energy X-ray of a nuclear fuel assembly. The nondestructive detection device comprises an accelerator system, a detection acquisition system, an image processing reconfiguration system and a remote control system, wherein the accelerator system comprises a ray machine head and a front collimator unit; the detection acquisition system comprises an acquisition output unit and an acquisition system shielding mechanism; the image processing reconfiguration system processes received image information through a watershed algorithm in combination with a level set algorithm; the remote control system controls the accelerator system, the detection acquisition system and image processing reconfiguration system, and sets pulse time sequences to different X-rays by the accelerator system through a Monte Carlo method, and sets the output time sequence of the detection acquisition system. The nondestructive detection device can perform X-ray detection on the nuclear fuel assembly in the environment of high radioactivity, so as to obtain high spatial resolution three-dimensional images.

The invention discloses a novel dual-energy X-ray imaging detector. The novel dual-energy X-ray imaging detector comprises a composite flicker body, wherein the composite flicker body is composed of two different sheet flicker bodies. One kind of flicker body is used for absorbing high-energy X-rays in a dual-energy X-ray and producing flickering light. The other kind of flicker body is used for absorbing low-energy X-rays in the dual-energy X-ray and producing flickering light. An optical module is located between the composite flicker body and an imaging sensor. The flicker light produced by the composite flicker body is enabled to form an image on the imaging sensor. The imaging sensor is used for detecting optical field distribution of the image formed on the light-sensitive surface of the imaging sensor and converting the image into a digital image. Three-dimensional spatial distribution information of flicker lighting points is obtained after arithmetic processing is carried out on the digital image. According to the novel dual-energy X-ray imaging detector, image formation of flicker light produced in a flicker body of a continuous structure is available, and the problems that high system complexity and low detection efficiency and the like caused by an independent flicker body array structure are solved.

This invention relates to a high energy x-ray photo taken device for changing films automatically. A film box is set on the base closely storing films composed of a shell connected with the plane on the base and a moving film frame closely locked with the shell. Multiple films are vertically and uniformly distributed on the frame, bottom of the frame is connected with a slewing gear driving the frame rotate, bottom of the slewing gear is connected with a drag gear horizontally fixed at the base. Said bracket is scarfly jointed on the middle of the frame by the horizontal slideway above the film box, claws with lifting structure are lifted vertically mounted on the bracket capturing films, a lifting unit and a pull unit are set between the bracket and the frame driving the bracket move vertically and horizontally.