94 results about "Scan time" patented technology

The embodiment of the invention provides a magnetic resonance imaging method and related equipment. The magnetic resonance imaging method comprises the following steps: applying a multi-spin echo sequence in each magnetization reset period, and collecting a group of multi-spin echo data sets until M groups of multi-spin echo data sets are obtained; after each magnetization reset period, a T1rho preparation pulse with spin locking duration is applied, then a multi-gradient echo sequence is applied, a group of multi-gradient echo data sets are collected until M groups of multi-gradient echo data sets are obtained, and the M groups of multi-spin echo data sets and the M groups of multi-gradient echo data sets correspond to M different spin locking durations respectively; and performing fitting operation on the M groups of multi-spin echo data sets and the M groups of multi-gradient echo data sets to generate a quantitative atlas. According to the technical scheme, the problems that a traditional T1rho sequence is long in scanning time, low in signal-to-noise ratio and single in contrast ratio are effectively solved, and the technical effects of time multiplexing and multi-contrast imaging are achieved.

This invention provides a system and method for scanning the properties of micro-regions in solar cells. The system includes: a one-dimensional laser source configured to generate a one-dimensional line-scan laser; a sample stage for holding the solar cell sample to be tested; a precision displacement device configured to cause relative movement between the one-dimensional laser source and the sample stage, enabling the one-dimensional line-scan laser to scan the measured region of the solar cell sample, comprising multiple micro-regions, in a cross-scan manner; a micro-region property measurement unit configured to acquire property data of the scanned measured region; and an automatic control and data processing unit configured to collect the property data from the micro-region property measurement unit, extract property information at the perpendicular intersections of the cross-scans based on the property data, and determine the distribution of micro-region properties based on the property information at the perpendicular intersections. This reduces the number of steps required for micro-region scanning, shortens the scanning time, and reduces the number of sampling operations.

This invention relates to the field of microscopy application technology, and in particular to a SICM scanning control method and related device based on feedback quantization. The method acquires the test height, initial scanning speed, initial safe height of the test point, first speed adjustment start point, and second speed adjustment start point of the test point. It controls the scanning probe to descend from the initial safe height of the test point to the first speed adjustment start point at the initial scanning speed, intervenes with first dynamic speed adjustment, continues to descend to the second speed adjustment start point, intervenes with second dynamic speed adjustment, and continues descending until the probe detects a sudden change in ion current and stops descending. This control method solves the problems of low scanning time resolution and poor safety in existing scanning ion conductivity microscopes by setting an initial speed adjustment point that dynamically adjusts the speed according to the probe's descent position.

The application relates to a magnetic resonance imaging method, device, computer equipment, storage medium and computer program product. The method comprises the following steps: in a first cardiac cycle, a characteristic electrocardio signal of a detection object is identified, a first sequence pulse is applied to the detection object after a preset delay time of identifying the characteristic electrocardio signal, and the first sequence pulse is used for reversing a longitudinal magnetization vector of the detection object; after the first sequence pulse is applied, a second sequence pulse of a target phase mode is applied to the detection object after a recovery time, and an initial cardiac imaging set is acquired, wherein the target phase mode is one of at least two different phase modes, and different target phase modes correspond to different positions of artifacts in the initial cardiac imaging sets; and the initial cardiac imaging sets obtained in each first cardiac cycle are subjected to first registration processing to obtain a cardiac imaging. The method can effectively weaken the artifacts in cardiac delayed enhancement imaging, and does not increase additional operations and additional scanning time.

The application discloses a signal scanning method and device, electronic equipment and storage medium. The frequency point information of all to-be-scanned frequency points is acquired; the frequency point scanning frequency of the to-be-scanned frequency points and the to-be-scanned frequency point cycle sequence are determined according to the frequency point information; the to-be-scanned frequency point cycle sequence is grouped according to the frequency point scanning frequency, at least one to-be-scanned frequency point grouping sequence is obtained, when there are multiple to-be-scanned frequency point grouping sequences, the frequency points contained in all to-be-scanned frequency point grouping sequences are not completely the same; all to-be-scanned frequency point grouping sequences are scanned in turn, and the scanning is stopped when a target signal is scanned, the problems that the scanning time is long, important services are easily missed, and voice is late to access in the prior signal scanning mode based on random arrangement scanning are solved, the signal scanning time is reduced, the signal scanning efficiency is improved, the probability of service loss and voice late access is reduced, and the user experience is improved.

An exemplary AI system and method are disclosed for reconstructing high-fidelity motion-corrected MRI scans from low-field, motion-corrupted MRI scans (e.g., neonatal MRI data) using a neural network (NN) model in combination with a physics-based motion model. The exemplary AI system and method can enhance image quality and remove motion artifacts which can allow for scans to be performed with significantly reduced scan time, a particular benefit for neonatal subjects as well as all patients when employing low-field MRI.

To suppress the occurrence of smear in recording.SOLUTION: A time required for print scanning is estimated from the width of image data and information on a printing method, and a delay time is set based on the estimated print scanning time.SELECTED DRAWING: Figure 7

This invention discloses a text layout image recognition system for published and printed textbooks, relating to the fields of artificial intelligence and computer vision. It includes a data acquisition synchronization module, an illumination feature analysis module, a brightness anomaly detection module, a paragraph reconstruction and repair module, and a light source dynamic compensation module. The data acquisition synchronization module acquires light source current waveforms, scanning light intensity changes, page line spacing markers, and imaging clock information during the text layout image recognition process, generating a draft containing a complete scanning time sequence. This invention achieves precise correspondence between light source brightness and scanning time sequence through synchronous acquisition of illumination and current, and illumination feature analysis, eliminating the influence of illumination fluctuations and improving the stability of layout recognition. Combining paragraph reconstruction and repair with dynamic light source compensation, a closed-loop control system from illumination detection to page reconstruction is constructed. Illumination balance is optimized through reverse illumination compensation and shading control, ensuring accurate line spacing, continuous layout, and consistent content logic.

Embodiments herein relate to passive intermodulation (PIM) delay estimation for multiple sources. In some embodiments, there is proposed a method (1200) for estimating a time delay of a PIM source for a radio device having multiple PIM sources. In an embodiment, the method may comprise the step of determining (S1201) a time delay window with respect to one or more possible PIM sources of the radio device. The method may further comprise the step of determining (S1202) a plurality of time delay values in a time delay window. The method may comprise the steps of: for each of one or more primary functions, scanning (S1205) each of a plurality of time delay values in a time delay window by performing an adaptive algorithm based on the primary functions to obtain an adaptive set of parameters, and estimating (S1208) one or more time delays for each PIM source from the set of adaptive parameters. Through the embodiments herein, an adaptive scan delay estimation method is proposed in place of a correlation estimation method, which can improve delay estimation accuracy for multiple PIM sources.

This invention discloses a method and system for adjusting and optimizing CT contrast-enhanced scanning parameters, comprising: acquiring the patient's physiological characteristic parameters and injection parameters, and calculating the contrast agent concentration at the target site at different times based on the physiological characteristic parameters and injection parameters, generating a time-density curve. The enhancement coefficient corresponding to the current peak voltage of the X-ray tube is determined using the CT contrast-enhanced curve, and the time-enhanced value curve of the current target site is determined by combining the time-density curve. The peak enhancement value is determined based on the scanning time window and the time-enhanced value curve, and the peak enhancement value is compared with the enhancement target. If the peak enhancement value does not meet the enhancement target, the injection parameters or scanning parameters are adjusted, and the peak enhancement value is recalculated and compared with the enhancement target. This process continues until the peak enhancement value meets the enhancement target. This method can automatically search and decide on the optimal CT contrast-enhanced scanning scheme in reverse, solving the problem of unsatisfactory CT scan results.

The invention discloses a two-bit gate working frequency screening method and system, a medium and a quantum circuit, and the method comprises the steps: carrying out the energy spectrum scanning of two quantum bits in a two-bit gate, and obtaining an energy spectrum scanning result and relaxation time; processing according to the relaxation time to obtain first dephasing time of the quantum bit under a preset error threshold; performing quantum state chromatography on the quantum bits to obtain corresponding residual coupling, obtaining a relationship between the residual coupling and bit frequency based on an energy spectrum scanning result, and determining a first frequency range; adjusting the bit frequency to a first frequency range, and respectively measuring second dephasing time of the two quantum bits under different signal frequencies through quantum phase chromatography; determining a corresponding second frequency range based on the first dephasing time and the second dephasing time, and obtaining a bit frequency corresponding to the minimum residual coupling as a working frequency; repeated calibration is not needed, experiment resources and scanning time are saved, and experiment efficiency is improved.

The invention is suitable for the technical field of magnetic resonance chemical exchange saturation transfer imaging, and provides a magnetic resonance chemical exchange saturation transfer imaging method, device, equipment, product and storage medium. A gradient echo sequence is adopted to collect saturated water molecule signals, and the collected water molecule signals are stored in a K space; and wave control coding is introduced in the acquisition process, and a CEST image is reconstructed based on a water molecule signal of a K space. The introduction of wave control coding can reduce the scanning time. Due to the fact that the wave control coding sampling efficiency is high, a larger matrix size can be supported within the same time, high-resolution imaging is achieved, the partial volume effect can be relieved, and CEST quantitative accuracy is improved.

The invention relates to a magnetic resonance scanning method, system and device and a storage medium. The method comprises the following steps: determining sequence scanning time corresponding to each mark delay scanning process according to corresponding mark duration time and mark delay time in a multi-mark delay scanning process required by a perfusion area to be scanned; obtaining a target pulse sequence based on the sequence scanning time; and scanning the perfusion area to be scanned according to the target pulse sequence until the multi-mark delay scanning process is completed. By adopting the method, the scanning efficiency can be improved.

The invention discloses a wavelength tuning phase-shifting interference method assisted by element absorption spectral lines and a resonant cavity. The wavelength tuning phase-shifting interference method comprises the following steps: establishing a system comprising a Fizeau interferometer, an external cavity tunable laser, an element absorption cell and the resonant cavity; phase-shifting interference measurement is carried out by using a sweep-frequency light source in cooperation with a Fizeau interferometer, and the change of an interference image is recorded by a high-speed CMOS camera; recording the spectral line of the light source scanning through the rubidium absorption spectral line and the resonant cavity; and calibrating the relationship between the scanning time and the scanning frequency according to the measurement spectral line, determining the phase change quantity according to the wavelength, selecting an interferogram corresponding to the phase change quantity according to the requirement of a phase shift algorithm, and calculating to realize high-precision detection of the surface type. According to the method, the phase shift is determined through high-precision wavelength determination, and the detection precision is improved. Meanwhile, due to high-precision wavelength resolution, the method can be applied to wavelength tuning phase-shifting interference with an ultra-long detection distance.

The embodiment of the invention discloses a code change problem scanning method and device, equipment and a storage medium. The method comprises the steps that in response to triggering of a target code change event, code change information corresponding to the target code change event is recorded; in response to triggering of a code saving event, performing problem scanning on the local code before and after change according to the code change information to obtain problem comparison information before and after change; and obtaining a pre-generated full-amount code scanning problem list, and updating the full-amount code scanning problem list according to the problem comparison information before and after the change so as to complete problem scanning of the change code. Based on this, by recording the code change information, problem scanning is only carried out on the changed local code, and the full-amount code scanning problem list is updated based on the problem comparison information before and after the change, so that the scanning time of the changed code is greatly shortened.

The invention discloses a radar resource scheduling method based on stacked beams, and the method comprises the steps: determining radar parameters, and an azimuth angle range and a pitch angle range which need to be scanned according to a plurality of target tasks; further determining the number of azimuth wave positions and the number of pitching wave positions; determining a plurality of pitching wave position piles corresponding to each azimuth dimension according to the number of the pitching wave positions and a preset number; based on the attribute information and the mapping relationship of each target task, aggregating a plurality of target tasks corresponding to the same azimuth dimension according to a pitching wave position pile to obtain a plurality of aggregated task packets corresponding to each azimuth dimension; and scheduling a target aggregation task packet from the plurality of aggregation task packets corresponding to each azimuth dimension, and carrying out parallel processing on a plurality of target tasks in the target aggregation task packet. According to the method, the searching and scanning time can be greatly shortened, and rapid discovery and response to high-speed and high-maneuvering targets and sudden threats are realized; the multi-task robustness of a radar system can be improved in a high-density target environment.

This invention discloses a dual-axis error calibration method for phased array weather radar based on the apparent motion trajectory of the sun, comprising the following steps: Step 1, calculation of the sun pointing angle; Step 2, selection of azimuth scanning parameters based on calibration error and azimuth deviation estimation; Step 3, evaluation of elevation angle calibration accuracy based on azimuth scanning time and apparent solar motion; Step 4, sampling of solar radiation signals; Step 5, extraction of peak values ​​in pulse-by-pulse repetition cycles and acquisition of dual-axis calibration coefficients. The method disclosed in this invention can generate dual-axis error calibration coefficients for X-band phased array weather radar that simultaneously meet high timeliness and high accuracy requirements. This is of great significance for effectively improving the detection capabilities of X-band phased array weather radar in mobile and unattended field applications.

The present disclosure addresses the challenges of in vivo phosphorus imaging by providing a clinically useful phosphorus MRI (PMRI) system and method that may be performed on a standard MRI system in a clinically reasonable scan time using specifically tuned coils, a phosphorus pulse sequence, and improved reconstruction and post processing algorithms.

The invention discloses a multi-parameter magnetic resonance quantitative imaging method and system, and relates to the technical field of MRI (magnetic resonance imaging), and the method comprises the steps: employing a multi-overlap echo sequence XMOLED, carrying out the simulation of magnetic resonance simulation software, and generating a simulation XMOLED image, constructing a simulation data set composed of a large number of paired simulation XMOLED images, simulation T2, T2 * and an apparent diffusion coefficient (ADC) quantitative graph, and training a deep learning neural network used for reconstruction of the magnetic resonance parameter quantitative graph; sequence parameters are configured on a magnetic resonance imaging instrument, an XMOLED signal of an actual imaging object is collected, and an XMOLED image of the actual imaging object is obtained through signal processing; and inputting the XMOLED image of the actual imaging object into the trained magnetic resonance parameter quantitative graph reconstruction network for reconstruction to obtain T2, T2 * and ADC quantitative graphs of the actual imaging object. According to the method, T2, T2 * and ADC quantitative diagrams can be obtained at the same time only through single-sequence XMOLED collection, the problem that scanning time is prolonged due to multi-sequence combined imaging is solved, and rapid and accurate multi-parameter quantitative magnetic resonance imaging is achieved.

The application discloses a kind of self-adapting focusing microscope equipment, adopt the data processor of ZYNQ heterogeneous multi-core architecture, and realize automatic focusing by step S1 to step S5, based on the parallel processing architecture of PL unit, namely FPGA, image convolution operation of multiple images can be executed in parallel in step S3, will not affect the line-by-line scanning process of microimage in step S1 is executed synchronously, so that while completing microimage scanning in step S1, step S3 has completed the most part of calculation of image definition evaluation function, when microimage scanning is completed, image definition evaluation function can calculate the definition evaluation value of microimage in very short time;Therefore, the application uses camera+ZYNQ heterogeneous multi-core architecture to replace the serial execution architecture of industrial camera+host computer in the prior art, only needs the scanning time of microimage+very short time to obtain definition evaluation value, greatly shorten the time of obtaining definition evaluation value, improve focusing speed.

A system and method for reducing scan time of periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) imaging include acquiring a plurality of blades of k-space data of a region of interest in a rotational manner around a center of k-space via a magnetic resonance imaging (MRI) scanner during a PROPELLER sequence, wherein each blade of the plurality of blades of k-space data includes a plurality of parallel phase encoding lines sampled in a phase encoding order. Each blade of the plurality of blades of k-space data is undersampled. The system and method include utilizing a deep learning-based Cartesian-like reconstruction network to individually and separately reconstruct each blade of the plurality of blades of k-space data to generate a plurality of fully sampled blades. The system and method include utilizing a PROPELLER reconstruction algorithm to generate a complex image from the plurality of fully sampled blades.

The invention provides a target detection method, device and equipment and a readable storage medium. The method is applied to a sensing sending node, and comprises the following steps: obtaining at least one piece of scanning beam list information, the beam scanning beam list information being used for indicating a plurality of scanning beam resources and / or a scanning time sequence of the plurality of scanning beam resources, and the plurality of scanning beam resources being used for determining position information of a target object; and sending the scanning beam according to the scanning beam list information. Through the scheme, the duration of the beam scanning period can be reduced.

The invention discloses a scanning method, system, equipment and product of a spatially selective nuclear magnetic two-dimensional spectrum, a plurality of constant gradients are generated, and nuclear magnetic scanning is carried out under each constant gradient, so that each overturning time and the number of repetitions are included in one constant gradient during each scanning, and therefore, the number of times of each overturning time and the number of times of repetitions are reduced. The influence caused by eddy current and residual magnetism under different gradients can be reduced; meanwhile, by taking the design principle of reducing the echo chain length without influencing the complete two-dimensional spectrum as the echo chain length, the echo chain time of each group of TI is gradually reduced; on the basis, the scanning time in a constant gradient can be reduced as much as possible, so that the overall scanning time can be shortened; besides, each overturning time and repetition times are included in one constant gradient, and the climbing times and interval times of the gradient can be reduced, so that the scanning time can be further shortened; therefore, the method not only reduces the influence caused by eddy current and residual magnetism under different gradients, but also shortens the scanning time.

To provide a control device capable of accurately discriminating an abnormality factor in an optical scanning unit.SOLUTION: The control device includes a processor for controlling an optical scanning unit including a scanning mirror that rotationally adjusts a scanning azimuth for each scanning cycle in a scanning field of view and a rotation angle sensor that senses a rotation angle of the scanning mirror. The processor is configured to repeatedly control a scanning time interval Ts triggered by detection of a scanning azimuth corresponding to a rotation angle sensed at each reference angle interval, and determine an abnormality cause in the optical scanning unit according to abnormality detection patterns F1, F2, and F3 as detection patterns in which a detection interval of the scanning azimuth deviates from the reference angle interval.SELECTED DRAWING: Figure 6

The invention provides a numerical control machine tool feeding and discharging fine control method and system, and relates to the technical field of laser cladding machining.The method comprises the steps that based on an image and a point cloud data set, coating fitting analysis is carried out, a first sub-stage coating three-dimensional model is generated, deviation comparison is carried out, and a second sub-stage coating deviation data set is determined; the preset powder feeding flow is corrected and analyzed in combination with the real-time powder amount of the powder cylinder so as to meet the requirement for the coating deviation data set of the second sub-stage, and the optimized powder feeding flow is obtained; and generating a second sub-stage optimization control strategy to execute feeding control of the second sub-stage scanning time window. By means of the method, the technical problems that according to an existing repeated laser cladding machining method, due to the fact that the cladding deviation of the previous machining stage cannot be accurately analyzed, targeted compensation cannot be conducted on the cladding deviation in time in the next machining stage, machining deviation is accumulated, and the overall cladding quality of a workpiece is poor can be solved; and the effect of improving the overall cladding quality of the workpiece can be achieved.

The utility model discloses a book, newspaper and periodical inventory RFID scanning device, the outer side of the bottom end of a grip is embedded and fixed with a rubber sleeve seat, the right side of a data processing module is symmetrically and fixedly provided with damping telescopic rods in the front-back direction, the right ends of the damping telescopic rods are fixedly connected with filler strips, the left part of the rear side of the data processing module is embedded and fixed with a rotating shaft sleeve, and the rotating shaft sleeve is fixedly connected with the data processing module. A grab rail is fixedly connected to the rear side of the rotating end of the rotating shaft sleeve, rapid plane placement operation of equipment is completed, a user can conveniently cancel the holding state during classification confirmation and arrangement of regional scanning information in book, newspaper and periodical inventory operation, the fatigue feeling generated by long-term holding is relieved, and the user experience is improved. The orientation of the display module can be adjusted by controlling the length of the damping telescopic rod, a proper observation visual angle is provided, neck ache is avoided, in addition, the grab rail auxiliary holding device capable of being rotationally stored is arranged, the wrist pressure of single-hand holding is relieved, the continuous scanning time of a user is prolonged, and the checking efficiency is improved.

The invention discloses a rapid bone scanning image noise reduction method based on a state space unsupervised diffusion network, and the method comprises the steps: collecting a noise-containing rapid bone scanning original image, carrying out the preprocessing, and constructing a non-diffusion module with a consistent period architecture; step-by-step noise adding is carried out on the conventional bone scanning image, a pure Gaussian noise image is generated, and the step-by-step noise adding process is based on a forward diffusion process of a Markov chain; fusing the pure Gaussian noise image and the rapid bone scanning image, and gradually denoising the fused image through a state space model; the denoising process is based on back diffusion of a Markov chain, and each back diffusion step is mapped through a state space model to output a high-quality conventional bone scanning image. According to the method, the rapid bone scanning image containing noise is converted into the high-quality image by utilizing the diffusion network based on the state space, the problem that the scanning time of a traditional whole-body bone scanning technology is long is solved, the application range is wide, and rapid, accurate, lossless and high-quality bone scanning image noise reduction can be achieved.

A tin-based solder alloy powder in the form of 2 µm to 38 µm spherically shaped tin-based solder alloy particles having an inorganic surface and a thin outer surface layer of stress castor oil, wherein the inorganic surface plus the thin outer surface layer of stress castor oil together form a surface area of the spherically shaped tin-based solder alloy particles, and wherein the surface area, when subjected to ToF-SIMS analysis with Ga+ primary ions having an energy of 15 keV and a total scan time of 5 minutes, shows a secondary ion mass spectrum comprising the following negatively charged secondary ion fragments: 113 amu with a relative signal intensity in the range of 0.7 to 3.1, 127 amu with a relative signal intensity in the range of 0.9 to 4.4, 136 amu with a relative signal intensity in the range of 1.4 to 6.7, 137 amu with a relative signal intensity in the range of 0.6 to 3.9, 152 amu with a relative signal intensity in the range of 1.3 to 12, 153 amu with a relative signal intensity in the range of 2.3 to 20, 183 amu with a relative signal intensity in the range of 0.6 to 16, 279 amu with a relative signal intensity in the range of 0.5 to 12, and 297 amu with a signal intensity of 1.

This invention provides a device and method for acquiring a simulated weight-bearing MR scan three-dimensional fusion model of the foot and ankle, comprising: an MRI scanner, a wearable device, a fixation device, and an image processing device; the wearable device is fixed to the upper body of the user, and the foot and ankle fixation device is fixed to the user's foot and ankle, simulating weight-bearing through a connecting rope; the MRI scanner is positioned above the user's foot and ankle, and the axis line of the inspection positioning light is aligned with the midpoint of the axis of the foot and ankle fixation device, and magnetic resonance images are acquired by scanning with the MRI scanner; the image processing device is communicatively connected to the MRI scanner, acquires the magnetic resonance images, and generates a three-dimensional fusion model of the foot and ankle. This invention shortens the scanning time while maintaining sub-millimeter-level reconstruction accuracy through small-angle pulses, FFE sequences, and undersampling technology. By combining water-lipid separation technology with multi-algorithm optimization, automatic and accurate segmentation of bone and skin is achieved, and the three-dimensional model meets the needs of clinical diagnosis and finite element analysis.

An electronic device is provided. The electronic device includes a display panel, a display driver IC to drive the display panel, and a processor operably connected with the display panel and the display driver IC, wherein the display driver IC is to set an operation mode, wherein the operation mode includes a first mode having a first refresh rate and a first scan time, a second mode having the first refresh rate and a second scan time, and a third mode having a second refresh rate and the second scan time, and is configurable to receive a stream of image data from the processor and output the stream of image data through the display panel in one of the operation modes.