353 results about "Image detector" patented technology

The invention relates to a method for reconstructing a 3D medical image of a region of interest from a set of 2D X-ray images acquired by an X-ray imaging system comprising an X-ray source(S) and an image detector (D), comprising the steps of: —computing n paths of the X-ray imaging system, n being an integer greater than or equal to 2, said paths being adapted to acquire n respective subsets of 2D X-ray images together forming the set of 2D X-ray images, each image (IA, IB, IC) of a subset defining a respective cone of projection (CA, CB, CC) of the region of interest onto the image detector, such that, for a same position of the X-ray source(S) along the n paths, the cone of projection of an image of any subset is contiguous to the cone of projection of an image of at least one other subset, wherein computing said n paths comprises: —placing a virtual isocenter (O) of the X-ray imaging system at a given position or set of positions relative to a center (C) of the region of interest, and —defining, for each position of the X-ray source along the n paths, the n cones of projection such that the center of a height of an enlarged cone formed by the union of the n cones of projection is said virtual isocenter (O): —implementing the computed n paths to acquire the n subsets of images: —reconstructing the 3D medical image by intersecting the cones of projection defined by each image of the n subsets.

The invention discloses a fast neutron imaging detector and a detection system, and belongs to the technical field of ray detection, the fast neutron imaging detector comprises a wave-shifting optical fiber array, scintillators and a photoelectric conversion array, the wave-shifting optical fiber array comprises a plurality of crisscrossed wave-shifting optical fibers, and gaps among the wave-shifting optical fibers are filled with the scintillators; and each photoelectric detector in the photoelectric conversion array is correspondingly coupled with the wave-shifting optical fiber. The detection efficiency of fast neutrons is effectively improved by increasing the thickness of the sensitive area of the detector, meanwhile, the collection efficiency of photons generated in the sensitive area of the detector can be remarkably improved through the crisscrossed wave-shifting optical fiber array, and the position information of a detection event can be accurately obtained in combination with a gravity center positioning method. Compared with a traditional fast neutron imaging detector based on combination of a camera and a conversion screen, the imaging detector has the advantages of fast response, large sensitive area, high detection efficiency and the like.

The invention relates to the technical field of gold leaching, in particular to a permanent magnet motor direct-driven stirring system of a gold leaching tank, which comprises a reaction shell, a driving module, a stirring module, a monitoring module and a control module, the control module obtains the specific condition in the stirring process through an image detector in the stirring process of each substance in a reaction cavity, and sends the specific condition to the monitoring module; whether the operation state of the stirring module is qualified or not is judged according to the floating sand change characterization parameter and the solute proportion characterization value, and corresponding treatment measures are adopted when it is determined that the current operation state is abnormal in time, specifically, the operation power of a permanent magnet motor is adjusted to a corresponding value according to the flow velocity difference characterization value, or the pre-tightening force of a corresponding bolt is corrected, and the operation state of the stirring module is determined to be abnormal. The operation stability of the stirring system is effectively improved, and the gold treatment efficiency is improved.

A calibration target for use with a radiographic image detector includes a target body securable to the image detector and a plurality of radiopaque linear markers, e.g. wires, fixed to the target body, wherein access to the image detector by incident radiation is at least partially blocked by the plurality of linear markers. By using the geometric properties of wires and advanced detection techniques, a precise calibration suitable for high-quality, volumetric three-dimensional CT reconstruction from biplanar X-ray images is achieved.

The invention relates to an underwater laser communication device and method, in particular to an underwater large-range searching and tracking duplex laser communication device and method, and solves the technical problem that rapid orientation and establishment of an optical communication link between underwater random motion platforms are difficult. The two-dimensional turntable is matched with the photoelectric detector and the image detector to respectively perform primary large-range scanning and secondary fine tracking scanning, so that a large scanning range is ensured, the method has the characteristics of high speed and high precision, and aiming at an underwater non-cooperative target scene, an uncertain area can be quickly reduced, initial pointing can be completed, and the accuracy of the underwater non-cooperative target scene is improved. The underwater random motion platform is found and captured, an optical communication link can be quickly established, meanwhile, the communication distance and the communication rate are effectively improved, the overall layout of equipment is compact and miniaturized, and engineering application is easy.

The invention discloses a copper pipe surface defect image detection device and method, and relates to the technical field of copper pipe surface defect detection.The copper pipe surface defect image detection device comprises a base, a supporting frame is fixedly installed at the top of the base, an electric telescopic rod is fixedly installed at the top of the supporting frame, and an image detector is fixedly installed at the free end of the electric telescopic rod; a long rod is fixedly mounted at the bottom of the electric telescopic rod; the anti-shaking device is arranged at the top of the base, the anti-shaking device comprises a rotating disc, a copper pipe body, a sliding rod, a circular plate, a trapezoidal block, an L-shaped rod, an arc-shaped plate, a fixed plate, an L-shaped plate, a supporting seat and a rotating plate, an electric telescopic rod moves downwards to drive a long rod to move downwards, and the long rod moves downwards to push the circular plate to move downwards; the inner wall of the copper pipe body is supported through the arc-shaped plates, a stable detection platform can be provided through supporting, and detection errors caused by external force or equipment vibration are reduced.

A system for the analysis of tubes adapted to contain biological samples is herein disclosed, the system having at least one support for a tube adapted to contain a biological sample, at least one image detector configured to acquire at least one image of the tube arranged on the support, and a processing unit adapted to process the images of the tube acquired by the image detector, wherein the processing unit is configured to perform a processing procedure based on a neural network which is trained based on exemplary images of tubes, wherein, in said exemplary images, the tubes comprise a label associated thereto. The neural network is programmed to perform a classification relating to the tube contained in the input image, wherein the processing unit is configured to output an output value vector comprising a plurality of output values, each of said output values being related to a certain class of the classification(s) and representing the activation level of a corresponding neuron of an output of the neural network.

The invention discloses a guided-mode resonance refractive index detection device and method based on a longitudinal gradient grating structure, and belongs to the technical field of optical sensing and imaging spectrum detection, the guided-mode resonance refractive index detection device comprises a light source, an optical isolator, a polarization controller, a collimation beam expander, a guided-mode resonance sensing chip, an image detector and a signal processing unit which are connected in sequence; the guided-mode resonance sensing chip is of a transmission type structure, the top of the guided-mode resonance sensing chip is provided with a strip-shaped nano structure which is consistent in period but longitudinally gradually changed, and an image detector is arranged below the guided-mode resonance sensing chip and used for receiving a transmission light signal penetrating through the guided-mode resonance sensing chip, generating a transmission light image and transmitting the transmission light image to the signal processing unit; and the signal processing unit is used for analyzing the transmitted light image and inverting the refractive index of the medium to be measured according to the structure mapping model. According to the invention, the longitudinal structure gradual change characteristic is introduced into the guided-mode resonance chip, so that the spatial distribution control of the monochromatic light resonance response position is realized, and finally the imaging refractive index sensing without an optical splitter is realized.

Systems and methods of detecting and monitoring edema in a subject are described. The systems and methods include light sources, image detectors, filters, and processors that determine whether a subject has edema and the degree of severity. In some embodiments, the processor fuses data from more than one imaging modality.

The invention relates to a photon counting imaging detector, in particular to a photon counting imaging detector with multiband composite detection capability, and solves the technical problem that an existing position-sensitive anode detector cannot detect multiple bands at the same time. The photon counting imaging detector with the multiband composite detection capability comprises a vacuum packaging tube body array, and a position-sensitive anode assembly, a detector frame and a detector end cover which are sequentially connected from bottom to top, the receiving ends of the vacuum packaging tube bodies are upwards arranged in the mounting block, and the N * M receiving ends of the vacuum packaging tube bodies are respectively provided with the same or different photoelectric cathodes for receiving target optical signals of different wavebands and converting the target optical signals into photoelectrons; the output ends of the N * M vacuum packaging tube bodies are respectively provided with a high-resistance collecting layer for receiving the photoelectrons and converting the photoelectrons into electronic cloud cluster signals for outputting; and the position-sensitive anode assembly is used for sensing an electron cloud cluster signal and transmitting the electron cloud cluster signal to an external readout electronics system for processing.

The invention discloses a coal-fired boiler combustion instability monitoring method and system based on multi-parameter fusion, and the method comprises the steps: constructing a hearth flame imaging system which comprises an image detector, a lens, a stainless steel cavity and a cooling air channel; the flame image intensity is converted into radiation intensity through blackbody furnace calibration, and the flame temperature and emissivity are calculated based on the Planck law; extracting flame characteristic parameters including average radiation intensity, temperature, emissivity and standard deviation thereof; constructing a load-flame characteristic parameter model, and predicting parameter reference values under different loads through multiple linear regression; and calculating a combustion instability index CII, carrying out weighted fusion on the normalized deviation of the real-time measured value and the predicted value, and judging that CII is equal to 1 when the flame area is 0 or the average temperature is lower than 900 DEG C. The flame radiation image and the unit operation parameters are fused, and the limitation of traditional single-parameter monitoring is solved; combustion instability dynamic quantitative evaluation is achieved through the CII index, and the method is suitable for early warning of the deep peak regulation working condition.

The invention belongs to the technical field of medical instruments, and discloses an auxiliary positioning device for medical image examination, which comprises an image detector, the right side of the image detector is fixedly connected with a horizontal mover, the upper part of the horizontal mover is slidably connected with an examination bed, and the lower part of the examination bed is rotatably connected with an adjusting structure. An L-shaped groove is formed in the detection bed, a first moving plate and a third moving plate are slidably connected into the L-shaped groove, and the adjusting structure is connected with the first moving plate. According to the auxiliary positioning device, the first moving plate, the second moving plate, the third moving plate, the clamping structures and the fixing columns are arranged, the telescopic connecting belt and the detection bed can be rapidly assembled through cooperation of the clamping plates, the springs and the fixing columns, the telescopic connecting belt can be conveniently and integrally disinfected in the follow-up process, and the practicability of the auxiliary positioning device is improved. When the telescopic connecting belt is abraded due to frequent stretching and friction, the telescopic connecting belt can be replaced in time, so that the maintenance cost is reduced, and the downtime of equipment is shortened.

A dental X-ray imaging system (100) comprises: a dental X-ray imaging unit (102) having an X-ray source part (114), an X-ray imaging detector part (116) with an X-ray detector, and a gantry part (112) for the X-ray source part (114) and the X-ray imaging detector part (116); and a control system (106). The control system (106) controls the parts of the dental X-ray imaging unit (102) to acquire an X-ray scout image (302) of the patient (300) by using a first, larger part of an active area of the X-ray detector, and to acquire panoramic dental X-ray image data of the patient (300) by using a second, smaller part of the active area of the X-ray detector being respective to the panoramic imaging. A method for a panoramic dental X-ray imaging of a patient (300), a computer program (714), and a tangible non-volatile computer-readable medium are also disclosed.

A calibration target for use with a radiographic image detector includes a target body securable to the image detector and a plurality of radiopaque linear markers, e.g. wires, fixed to the target body, wherein access to the image detector by incident radiation is at least partially blocked by the plurality of linear markers. By using the geometric properties of wires and advanced detection techniques, a precise calibration suitable for high-quality, volumetric three-dimensional CT reconstruction from biplanar X-ray images is achieved.

The invention discloses a nondestructive testing device and method based on a compact D-D neutron source and application. According to the device, a compact D-D neutron source is used as exogenous neutrons, and 2.5 MeV D-D fast neutrons are moderated into thermal neutrons or epithermal neutrons through a neutron moderator located in front of a neutron generator. The moderated neutrons enter a horizontally-arranged conical neutron collimator, and the hole channel is small in front and large in rear. The collimated thermal neutron beam penetrates through an object to be detected, and thermal neutrons penetrating through the object are detected by a thermal neutron image detector system installed in front of the moderator and converted into a digital transmission image. The system obtains the two-dimensional spatial distribution of the thermal neutron transmission intensity and the material component content, so that the internal structure of the detected object and the spatial distribution characteristics of different materials are analyzed. The device has the advantages of portability, rapidness, accuracy, nondestructive testing and good spatial resolution, and is suitable for nondestructive testing of objects.

The utility model provides a nanoscale precision machining surface integrity detection device for precision machining, which belongs to the technical field of detection devices and comprises a machine body, a platform is arranged in the machine body, a rotating mechanism is arranged in the platform, and the rotating mechanism comprises a mounting seat, a driving motor, a speed reducer, a rotating rod and a turntable. According to the utility model, through the arrangement of the rotating mechanism, the placing disc can rotate orderly, the workpiece on the placing disc can be rapidly detected by matching with the use of an image detector, and through the arrangement of the clamping mechanism, the workpiece is kept stable in the detection process and is prevented from moving or rotating in the detection process, so that the detection efficiency is improved. The safety of the whole detection process can be ensured, the image detector can be driven to sweep or move on the to-be-detected surface of the workpiece through the arrangement of the first moving mechanism and the second moving mechanism, and it is ensured that the image detector can cover all the to-be-detected surfaces of the workpiece.

A counterbalanced imaging device is provided and includes an imaging source and an imaging detector. The counterbalanced imaging device also includes a gantry ring that physically supports the imaging source and the imaging detector. The gantry ring also enables the imaging source and the imaging detector to simultaneously rotate about a center of rotation. The gantry ring may also comprise a detachable segment having one or more counterbalance measures contained therein to align a center of gravity of the gantry ring with the center of rotation when the detachable segment is mounted onto the gantry ring.

The invention relates to the technical field of non-contact temperature measurement, in particular to a transient temperature field measurement method, system and device and a medium, and the transient temperature field measurement method comprises the steps: synchronously collecting an original spectral signal and an original grayscale image of a transient temperature field; discretization processing is carried out on the corrected spectrum, a theoretical radiation spectrum corresponding to each temperature element is obtained, an image gray value-radiation brightness mapping relation is established, and temperature element weight initial distribution is obtained; optimizing by using an optimal solution algorithm to obtain an optimal temperature primitive weight; and inverting the temperature field by using the optimal temperature primitive weight and the histogram of the original grayscale image to obtain a final fusion image of the transient temperature field. According to the method, the dynamic reconstruction of the two-dimensional temperature field of the explosion fireball is realized by constructing the temperature primitive model and combining nonlinear least square optimization and image mapping of the image detector, and the problems of large single-point inversion error and low spatial resolution of the transient high-temperature field are solved.

Disclosed in the present invention is a visual monitoring method for cross-section temperature fields and radiation characteristics of boiler furnaces by combining radiation images and spectra. Image detectors can be directly inserted into observation holes of a boiler to acquire flame image data, so that when the detection system is applied to a power station boiler, extra holes are not required to be drilled, and therefore, there is no risk that the strength of a furnace wall of the boiler is reduced by drilling holes. According to cross-section temperature fields of a furnace measured by the detection system, the state of combustion in the furnace can be accurately judged, which can play an accurate and effective guiding role in boiler combustion control, and reduce the temperature deviation in each combustion area of the boiler so as to keep the boiler running smoothly, thereby improving the combustion efficiency of the boiler.

An agricultural machine includes a vehicle, an image detector, memory, a processing circuit, and a steering control unit. The vehicle has at least one agricultural implement affixed thereto. The image detector is mounted to the vehicle and is configured to generate first image data. The memory stores at least a first trained model of a crop row detection neural network. The processing circuit is configured to generate a crop row prediction image using the first image data, the first trained model, and a convolutional neural network. The processing circuit is further configured to generate navigational parameters based at least in part on the crop row prediction. The steering control unit is configured to control movement of vehicle based on the navigational parameters.

The invention discloses a multi-wavelength laser collimator based on radial shearing. The multi-wavelength laser collimator comprises a near-field reference, a telescope objective combination, a bifocal objective and an image detector which are sequentially arranged along a light path. Aberration-free imaging of near-field light beams is achieved through a bifocal objective lens, and meanwhile far-field pointing is detected through coaxial shearing interference generated by means of amplitude light splitting. A single non-mobile sampling detection light path and a single detection sensor are used to realize simultaneous acquisition of near-field position information and far-field pointing information of a laser beam; the light spot position deviation and the fringe translation amount are analyzed through a computer, and high-precision collimation is achieved through a feedback control system. And the detection of the angle direction of the laser beams with various wavelengths can be realized by using a radial shearing interference technology. The device breaks through the limitation of traditional double-optical-path collimation, has the characteristics of simple structure, strong anti-interference performance, multi-wavelength applicability and the like, remarkably improves the collimation precision, reduces the cost, and has important application value in the field of laser precision collimation.

An apparatus for observing dynamic systems by time-resolved microscopy has an optical microscope including a cryo stage for receiving a cryo sample and maintaining the cryo sample at a cryogenic temperature, a heating system configured to temporarily heat at least a portion of the cryo sample such that the portion of the cryo sample melts to a liquid state, temporarily resides in the liquid state, and then revitrifies, and an image detector associated with the optical microscope for detecting magnified images of the cryo sample generated by the optical microscope. Detected images may be recorded and analyzed to inform on-the-fly adjustment of heating power level delivered to the cryo sample. In a correlative light-electron microscopy method, the revitrified cryo sample is observed using an electron microscope.

To provide a dental X-ray imaging system for a computed tomography (CT) dental X-ray imaging of an object.SOLUTION: The system comprises: a dental X-ray imaging unit comprising an X-ray source part, an X-ray imaging detector part and a gantry part; and a control system. The control system is configured to: receive a scan request comprising an indication of a region of interest (ROI); control the dental X-ray imaging unit to acquire two X-ray scout images of the object; detect a target structure of the object from the two X-ray scout images associated with the ROI by applying a trained detection model for the X-ray scout images; define field-of-view data of the dental X-ray imaging unit at least partially based on the detected target structure; and control the parts of the dental X-ray imaging unit to implement the defined FOV data for a CT scan of the object in order to acquire dental CT X-ray image data of the object.SELECTED DRAWING: Figure 1

An X-ray imaging device emits an X-ray to irradiate an object and includes an object moving mechanism that rotates the object; an X-ray image detector to detect a projection image of the object; an object temperature adjusting mechanism configured to change a temperature of the object; and a processing unit configured to acquire a cross-sectional image of the object by a reconstruction calculation from the projection images detected by the X-ray image detector by rotating the object. The processing unit is acquires a plurality of cross-sectional images and of the object captured at a plurality of different temperatures T1 and T2, and divides an inside of the object into regions for each of substances using a distribution of pixels of each of the cross-sectional images based on CT values obtained at the plurality of temperatures T1 and T2 at which the cross-sectional images of the object are acquired.

An electronic cassette has a detection panel (light detection substrate) in which pixels for accumulating electric charges corresponding to radiation are arranged. The electronic cassette includes two gate control circuits that control an operation of a gate drive circuit, a power supply circuit that supplies power to the gate control circuits, a first wiring line, and a second wiring line. The first wiring line connects the power supply circuit and each of two gate control circuits to each other, and supplies each of two gate control circuits with the power supplied from the power supply circuit. The second wiring line connects two gate control circuits to each other. The power supplied from the power supply circuit to one of two gate control circuits is diverted to the other, through the second wiring line.

The invention discloses a coding LED illumination light source and an active hyperspectral imaging system, and effectively overcomes the defects of insufficient luminous flux and low signal-to-noise ratio in the current active hyperspectral imaging system based on the LED illumination light source. The system comprises an LED control module, an LED light-emitting module, a heat dissipation module, a focusing and dodging module, an imaging lens, an image detector, a computer and the like. The method is characterized in that coding illumination is carried out through a plurality of LEDs with different wavelength combinations based on a spectrum calculation principle, the illumination intensity of the active hyperspectral imaging system is multiplied, and the signal-to-noise ratio and the sampling speed of the system are improved. The invention provides a novel active hyperspectral imaging mode which can effectively meet the application requirements in different scenes such as high-resolution microscopic hyperspectral imaging and video-level high-speed hyperspectral imaging.

The invention relates to the technical field of neutron imaging and detection, in particular to a data processing method for a neutron imaging detector based on a micro channel plate (MCP), and more particularly relates to a waveform analysis and example reconstruction algorithm for white light neutron resonance imaging. Comprising a waveform analysis step and a case reconstruction step, in the waveform analysis step, an advanced waveform recognition technology is adopted, off-line analysis is carried out on signal waveforms on an anode plate of the neutron imaging detector, and the signal waveform of each electron group is accurately recognized; in the case reconstruction step, the signals are grouped and paired based on a waveform analysis result, and an accurate position reconstruction model is constructed to obtain an accurate coordinate of an electron group hit position; the method not only improves the imaging precision and the counting rate, but also optimizes the data processing flow, adapts to the condition of high counting rate, improves the overall performance of the system, expands the application field, and provides powerful support for the development and application of the neutron imaging technology.

The invention discloses a portable nuclear radiation imaging module test system based on FPGA, including a signal input interface, an analog-to-digital converter, an FPGA, a data cache module, and an HDMI display; the signal input interface is used to access the four-way analog signal output by the nuclear radiation imaging detector module and convert it into a digital signal through the analog-to-digital converter, and the digital signal is processed in sequence by digital filtering, pole-zero cancellation, baseline subtraction, pile-up rejection, and peak extraction in the FPGA to obtain the peak value of the effective four-way coincidence signal, and calculate a number of pairs of coordinate values, which are stored in the data cache module, and after reaching the set storage depth, the scatter image is calculated by the scatter image drawing module inside the FPGA, and the scatter image is sent to the display for display. The present invention can realize the rapid and accurate testing of the imaging results of the nuclear radiation imaging detector module, and has a small size, convenient use, portability and universality.

The invention relates to the technical field of image processing, and particularly provides a multifunctional image generation device and an image generation method.The multifunctional image generation device comprises an FPGA, a DSP, an optical fiber module, a Cameralink video coding chip, a PAL video coding chip, an SDI video coding chip, a control key, MAX3490, a DDR and a crystal oscillator; and the image data is transmitted to the image coding chips corresponding to the images of the different systems according to the time sequences of the images of the different systems, and the images of the different systems are obtained through conversion in a synchronous transmission mode. The device can be applied to a computer with a PCIE interface, can generate and output same images of different standards or different images of different standards at the same time, and can also be independently used without the computer to generate target images of specific sizes and contrast ratios, so that the use flexibility of the whole device is improved, and the use cost is reduced. The method can be applied to evaluation and detection of image target tracking equipment and simulation of video output of an image detector.

The invention discloses a color polarization image sensor based on a spectrum routing metasurface, and belongs to the field of image detectors. According to the invention, a color focal plane polarization imaging detection technology is adopted, a superstructure surface with a double-layer structure is used to replace a commercial Bayer array optical filter and a micro-polarization array, and color and polarization information of light can be captured at the same time, so that details and contrast of an image are improved; and the polarization channel and the color channel complement each other, so that color imaging, polarization imaging and color polarization fusion imaging can be carried out in real time according to requirements. According to the method, light guidance and polarization detection are introduced by adopting spectrum routing, so that the object identification and classification capability is enhanced especially in a complex illumination environment, and the material and the surface state can be identified more accurately, thereby providing richer information. Finally, the improvement of the whole technology opens up a new possibility for scientific research and industrial application.