42 results about "Plate detector" patented technology

The invention provides a matching method and equipment of a flat panel detector and a grid, and a medical imaging system. The method is used for a combination of a flat panel detector and a grid, comprising: collecting the exposed first image; acquiring basic information of the flat panel detector; acquiring the theoretical frequency of the grid line of the grid; according to the basic information of the flat panel detector Determine the actual sampling frequency of the flat panel detector, calculate the estimated frequency of the grid line artifact in the first image caused by the grid line according to the grid line theoretical frequency and the actual sampling frequency of the flat panel detector; The estimated frequency is used as the center to set the maximum allowable deviation interval; and the actual frequency of the grid line artifact is found within the maximum allowable deviation range, and the grid line artifact in the first image is removed to obtain the second image. The invention can achieve the ideal grid line artifact removal effect for different combinations of flat panel detectors and grid lines.

The invention discloses a flat panel detector and a pixel driving circuit thereof, wherein the pixel driving circuit comprises: a plurality of pixel units arranged in an array; a plurality of capacitors connected to the plurality of pixel units in the column for storing Output the charge data generated by multiple pixel units in the column. The pixel drive circuit adopts the method of setting the storage capacitor outside the pixel area as a column storage capacitor. The size of the capacitor is no longer limited by the size of the pixel, so that it can better cooperate with the large amount of charge read out by the flat panel detector and reduce the readout of the flat panel detector. The signal-to-noise ratio of the signal can improve the image quality.

The invention relates to a mass spectrometry instrument, in particular to an ionic migration spectrometry-flight time mass spectrometer, and the mass spectrometer comprises an ionic migration spectrometry cavity, a mass spectrometry transmission area cavity, a mass analyzer cavity and a data acquisition card; an ionization source, an ion gate and an ion migration region electrode are sequentiallyarranged in the ionic migration spectrometry cavity from top to bottom; a repulsion polar plate, a flight time mass analyzer and a micro-channel plate detector are arranged in the mass analyzer cavity; pulse voltages Ugate, Upulse and Ucard are respectively applied to acquisition trigger terminals of the ion gate, the repulsion polar plate and the acquisition card; and the pulse voltage Upse and the pulse voltage Ucard are synchronized based on the rising edge or falling edge moment of the pulse signal of the pulse voltage Ugate. The ionic migration spectrometry-flight time mass spectrometer can effectively improve the utilization efficiency of ions, the two-dimensional analysis speed of ionic migration spectrometry-mass spectrometry and the detection sensitivity by synchronizing and modulating the pulse time sequences of the ion gate, the repulsion polar plate and the acquisition card.

The invention provides a flat panel detector and a manufacturing method thereof. The flat panel detector includes a base substrate, a sensing electrode, a bias electrode and an insulating layer, the sensing electrode and the bias electrode are located on the base substrate, and the insulating layer is located between the sensing electrode and the bias electrode. The electrode is far away from the side of the base substrate, and the thickness difference between the region of the insulating layer corresponding to the sensing electrode and the region of the insulating layer corresponding to the bias electrode is not greater than a preset threshold. In the embodiment of the present invention, when a sufficiently high voltage is applied on the insulating layer and turned on, since its thickness is relatively uniform, the dark current generated by the sensing electrode and the bias electrode under the insulating layer is also relatively uniform, thus improving the flat panel detector. The uniformity of the dark current distribution helps to improve the detection accuracy of the flat panel detector.

The invention belongs to the technical field of coal separation, in particular to a mobile gangue photoelectric separation robot; including a vibration feeding module, a conveying module, a dual-energy X-ray recognition decision-making module and a coal-gangue separation module; a dual-energy X-ray The source is fixedly installed in the installation box, and the dual-energy X-ray source is located directly above the conveyor belt; the X-ray flat panel detector is installed directly below the empty belt of the conveyor module, and the X-ray flat panel detector corresponds to the dual-energy X-ray source ; The measurement and control instrument is connected with the dual-energy X-ray source electrical signal; the power supply device is used to supply power to the measurement and control instrument, the dual-energy X-ray source and the X-ray flat panel detector; Intelligent and efficient separation of coal gangue based on dual-energy X-ray transmission coal preparation The equipment can realize real-time intelligent separation of coal and gangue underground. Compared with underground jigs and dense medium cyclones, etc., it optimizes the coal preparation process, improves the separation rate of coal and gangue, and reduces the cost of the chamber area. Occupy, improve the quality of coal.

The invention provides a flat panel detector structure and a preparing method thereof. The preparing method comprises the steps of providing a substrate and preparing a lower electrode layer on the substrate; providing a radiation absorbing material liquid, wherein the radiation absorbing material liquid comprises a lead-containing compound liquid; and coating the radiation absorbing material liquid on a lower electrode layer to prepare a light-converting layer on the lower electrode layer based on the coated radiation absorbing material liquid; and preparing an upper electrode layer on the light-converting layer. The structure and method of the invention improve the materials of the existing light-converting layer, improve the radiation absorption capability of the light-converting layer,reduce the thickness of the light-converting layer, design the forming method of the light-converting layer and solve the problem in forming a polycrystalline structure. Furthermore, the chemical composition and phase uniformity of the device are improved; the uniformity of the image is raised; the effective utilization of raw materials is raised; the process equipment is simplified; the structure of the detector is designed; the problem of leakage current is mitigated; the noise of detector is reduced; the sensitivity and the contrast ratio are raised; the electrode materials of the detectorare improved; and the cost is reduced.

The invention relates to a device and method suitable for agricultural scientific research workers who can simultaneously acquire three-dimensional morphological parameters of rice plants and rice root systems for non-destructive measurement in rice cultivation and genetic breeding research. The CT detection device of the present invention is mainly composed of 7 functional modules: a ray source, a flat panel detector, a load rotating table, a lifting module, a roller conveying line, a precision motion controller and a computer system; the present invention adopts the roller conveying line to The sample to be tested is transported from the planting area to the detection area, and the automatic positioning and rotation of the potted crops and the automatic lifting of the ray source flat-panel detector are realized through the precision motion controller, so as to obtain the visible light images of the aboveground plants and the underground root system at different angles and heights. The X-ray tomographic image is then used to obtain the 3D reconstruction data of the rice plant and root system through the motion restoration algorithm SFM and the cone beam FDK algorithm, and then the 3D model data of the whole rice plant is obtained through the fusion algorithm, and the traits are analyzed.

The present invention provides a SiPM-based automatic exposure detection device and method, and a flat panel detector, wherein the SiPM-based automatic exposure detection device is applied to a flat panel detector, and it at least includes: a SiPM sensor module connected to the SiPM The signal conditioning circuit of the sensor module is connected to the hysteresis comparison circuit of the signal conditioning circuit, and is connected to the FPGA circuit of the hysteresis comparison circuit. The SiPM-based automatic exposure detection device of the present invention uses SiPM as a sensor, and SiPM has single-photon detection capability. Compared with the sensor in the existing AED module, it has stronger photon detection capability and can detect X-rays more quickly. Changes, to maximize the synchronization of T1 and T0 moments, reduce dose loss, greatly reduce or even eliminate the transition zone; the saturation recovery time of SiPM is as short as ns level, which can detect the exposure end signal more quickly and accurately.