54results about How to "Reduce scan time" patented technology

The invention provides a fast magnetic resonance reconstruction method and system based on a multistage wavelet convolution network, and particularly relates to the technical field of magnetic resonance imaging and image reconstruction, and the scheme comprises the steps: collecting multi-channel under-sampling K space data; inverse Fourier transform is carried out on the multi-channel under-sampling K space data to obtain an under-sampling magnetic resonance image; and inputting the undersampled magnetic resonance image into a trained multi-stage wavelet convolutional network for reconstruction to obtain a reconstructed magnetic resonance image, the multi-stage wavelet convolutional network being constructed based on multi-stage wavelet transform and a convolutional neural network. According to the scheme, the magnetic resonance K space data is collected in an undersampling mode, the scanning time can be shortened, the multi-stage wavelet convolution network can effectively reserve high-frequency details of the image in the reconstruction process, and therefore the reconstruction quality and efficiency of the multi-channel magnetic resonance image can be remarkably improved on the whole.

The invention provides a focused ultrasound blood brain barrier opening effect prediction method and system, a medium and a terminal, and the method comprises the steps: carrying out the preprocessing of all collected acoustic signal data, and constructing a training data set based on the blood brain barrier opening effect data; training a deep learning model by using the training data set to construct a blood brain barrier prediction model; and on the basis of the blood brain barrier prediction model, predicting the permeability of the blood brain barrier according to the obtained real-time acoustic signal data of the ultrasonic contrast agent in the process of regulating and controlling the blood brain barrier so as to output a blood brain barrier opening effect prediction result. The acoustic signals are analyzed based on the artificial intelligence algorithm, a magnetic resonance contrast agent does not need to be injected, the long-time scanning process is avoided, safe and rapid prediction of the blood brain barrier permeability is achieved, and the test cost is reduced. Compared with a dye tracing method, the blood brain barrier permeability prediction method based on artificial intelligence does not need to perform any operation on a target test, is convenient and rapid, and has a living body detection capability.

The invention relates to the technical field of magnetic resonance imaging, and discloses a motion estimation guided magnetic resonance four-dimensional dynamic imaging method and device, and the method comprises the steps: obtaining a three-dimensional single-frame static image of magnetic resonance and an under-acquired low-resolution four-dimensional dynamic image sequence, the low-resolution four-dimensional dynamic image sequence is a multi-frame low-resolution four-dimensional dynamic image obtained by carrying out undersampling on K space acquisition data; utilizing a motion encoder in the image sequence prediction model to extract motion estimation information in the low-resolution four-dimensional dynamic image sequence; inputting the three-dimensional single-frame static image into a structure encoder in the image sequence prediction model to obtain static anatomical structure information; and fusing and decoding the motion estimation information and the anatomical structure information through a decoder to obtain a high-resolution four-dimensional dynamic image sequence. The problems that an existing magnetic resonance four-dimensional imaging technology is long in scanning time, complex organ movement is difficult to capture, and time-space consistency is poor are solved.

The invention discloses reactor pressure vessel inspection equipment and a reactor pressure vessel inspection method. The reactor pressure vessel inspection equipment comprises a supporting frame body, a lifting mechanism installed on the supporting frame body, a rotating mechanism installed on the lower portion, facing a barrel, of the lifting mechanism, a connecting pipe scanning arm installed below the rotating mechanism and two multi-degree-of-freedom mechanical arm probe frames. The lifting mechanism can move relative to the supporting frame body and drives the rotating mechanism and the connecting pipe scanning arm and the multi-degree-of-freedom mechanical arm probe frame on the rotating mechanism to move up and down along the central axis of the cylinder body. And the rotating mechanism drives the connecting pipe scanning arm and the multi-degree-of-freedom mechanical arm probe frame on the rotating mechanism to rotate. According to the invention, the two multi-degree-of-freedom mechanical arm probe frames are matched with the connecting pipe scanning arm to scan the reactor pressure vessel, and the multi-degree-of-freedom mechanical arm probe frames and the connecting pipe scanning arm can scan synchronously in parallel, so that the scanning time is shortened, the working efficiency is improved, and the time for overhauling a key path of a nuclear power plant is greatly shortened.

The invention provides a laser-assisted sintering method of a TOPCon solar cell, and relates to the technical field of TOPCon solar cells. The laser-assisted sintering method comprises the following steps that a battery piece subjected to light injection treatment is placed on an operation table, external voltage is applied to the battery piece to ensure that the front face of the battery piece is a negative electrode power source, and a laser is adopted to only conduct laser scanning treatment on a grid line area of the battery piece. The laser scanning treatment comprises the following specific steps of: scanning a laser beam along one side of the grid line, then scanning the end part of the grid line for the second time in an S shape along the other side of the grid line, and covering the position of the grid line by a light spot during each scanning; and all the grid lines are scanned by the laser. The laser-assisted sintering method has the advantages that the process time is shortened, the energy is finely controlled, and the conversion efficiency of the battery piece is improved.

The invention relates to the field of optical detection, in particular to an interference confocal measurement system based on two-dimensional dispersion and a measurement method thereof. White light generated by a light source is collimated into parallel light through a first collimating lens, is shaped into rectangular light through a rectangular diaphragm, and is shaped into a linear light beam through a column focusing lens and a rectangular slit; the light is divided into reference light and object light through a beam splitter, the reference light is achromatic through a first achromatic objective lens, then enters a reference plane mirror and is reflected back to the beam splitter by the reference plane mirror, the object light is focused to positions of different depths of an object to be measured after being dispersed through a dispersion lens and is reflected back to the beam splitter by the object to be measured, and the two beams of light are reconverged in the beam splitter. And after being collimated by the second collimating lens, dispersed by the dispersion grating and achromatic by the second achromatic objective lens in sequence, the light is focused on the target surface of the spectrograph for spectrum and interference analysis. According to the invention, line scanning, dispersion and interference measurement are combined, so that the measurement precision can be greatly improved.

The embodiment of the invention discloses a magnetic resonance signal acquisition method and system based on chemical exchange saturation transfer. The method comprises the following steps: applying a pre-configured pulse sequence to a scanned object to acquire a magnetic resonance signal; wherein the pulse sequence comprises a saturation module, the saturation module is used for enabling chemical exchange in the scanning object to reach a steady state, the saturation module comprises a plurality of saturation pulses, and a time gap exists between each pair of adjacent saturation pulses in the plurality of saturation pulses; and each acquisition module is used for acquiring magnetic resonance signals corresponding to one or more k-space trajectories, and the application time of at least one acquisition module is in a time gap between a pair of adjacent saturation pulses. Therefore, the scanning time can be effectively shortened.

The utility model discloses a cell observation equipment with double camera module, including observation platform, first camera and second camera, and observation platform has a transparent observation area, and the observation area is used for placing the object to be observed, and the first camera is set below the observation area, is used for gathering the image information of observation area, to obtain the position of the object to be observed, and the second camera is set below the observation area, and the second camera is closer to the observation platform than the first camera, and the second camera can move to the just below the object to be observed according to the position of the object to be observed, to utilize the second camera to observe the object to be observed. The utility model discloses technical scheme has improved the alignment efficiency and alignment accuracy.

Embodiments of the present application provide a deep scanning method, an electronic device, a storage medium and a program product, the method comprising: receiving a first message request sent by a client; determining a first scanning state corresponding to the first message request according to the first message request; cyclically receiving an Nth message request sent by the client, changing the first scanning state to a second scanning state after scanning a cache file is completed; and in the case that the second scanning state is a scanning end, sending the cache file corresponding to the first message request to a server, adding a state machine for sensing a scanning state, used for maintaining a state and a corresponding operation of a scanning service, so that multiple message requests can be processed in a case of a long connection, and each scanning state is identified, the problem of invalid deep scanning service in a long connection multiple request scenario is solved, the scanning efficiency is improved, and the scanning time is reduced.

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.

The invention discloses an automatic sketching method and device for a radiotherapy structure based on 2D data, and belongs to the field of medical image processing, and the method comprises the steps: S1, collecting a patient data set comprising an X-ray image and a paired CT image; s2, a spatial dimension expansion generation model from the x-ray image to the CT image is constructed, and the spatial dimension expansion generation model comprises an encoder, a spatial expansion module and a decoder; s3, training the spatial dimension expansion generation model in the step S2 by using the X-ray image acquired in the step S1 and the paired CT image, and adjusting the weight through iteration to minimize CT reconstruction loss and CT projection loss; and S4, training the basic sketching model by using the X-ray image acquired in the step S1 and the paired CT image. The problems that the current adaptive radiotherapy technology depends on a 3D image, the cost is high, and the time of fractional treatment is long can be solved.

The present invention discloses a sheet metal trimming auxiliary measurement device and a measurement method thereof, the measurement device comprising: a measurement body, comprising a cylinder with an opening, the opening being formed by enclosing the area from the axis of the cylinder to the circumferential surface, thereby forming two measurement surfaces in the longitudinal section of the cylinder; at least one magnetic strip, arranged in the measurement body near one of the two measurement surfaces along the axis of the cylinder; wherein the cross section of the measurement body is in a first sector shape, the cross section of the opening is in a second sector shape, the sum of the central angles of the first and second sectors is 360°, and the central angle of the first sector is greater than 180°. The present invention ingeniously converts the sheet metal trimming that is difficult to detect into the measurement of the cylindrical surface, reduces the shooting and scanning time, and improves the measurement efficiency. At the same time, many previously inaccessible corner features are now accessible, which improves the detection accuracy and accessibility.

The invention relates to the technical field of scanning devices, in particular to a quick response X-ray scanning device based on a micro-electro-mechanical chip, which comprises a detection table, a photoelectric sensor is arranged in the detection table, a plurality of positioning blocks are arranged on the detection table, and a table top of the detection table is used for bearing an object to be imaged; the X-ray source is arranged above the detection table and can emit X-rays to the direction of the detection table, and the X-ray source is connected with a movable support capable of driving the X-ray source to move; the detector is connected with the detection table and can receive the X-rays penetrating through the object to be imaged and convert the X-rays into digital signals; the detection table fixes the position of an object to be imaged through the positioning block, the image acquisition module acquires an image of the detection table, and the control module adjusts the position of the X-ray source according to the position of the object to be imaged on the image so as to completely scan the object to be imaged. By accurately positioning the position of the object to be imaged and standardizing the image of the object to be imaged, the accuracy and reliability of the whole scanning process are improved, and the scanning efficiency and the imaging quality are improved.

This disclosure provides a method for generating an image of an object using an MRI system, the method comprising providing a readout-coded imaging shearing (SIREN) gradient pulse in a phase gradient signal waveform. The phase gradient signal waveform is applied to the phase gradient coil of the MRI system. The application of the SIREN gradient pulse provides the object's SIREN k-space, which has SIREN k-space lines with shear angles. MR image spatial data from this SIREN k-space is then obtained by applying reconstruction techniques. Finally, the image of the object is generated by transforming the SIREN MR image spatial data into regular image spatial data based on the shear angle using a decoding algorithm.

The present invention relates to the technical field of medical devices, and in particular to a laser measuring device for measuring human body morphology, comprising a telescopic rod, an annular guide rail, a laser measuring assembly and a laser scanning device, wherein the telescopic rod can adjust its own height according to the height of a target to be measured, so as to satisfy the laser scanning device for scanning the target to be measured; a data analysis module obtains a two-dimensional image according to an initial morphological three-dimensional image, determines an actual two-dimensional image complexity value according to the area of ​​the two-dimensional image and the number of feature points, determines a secondary refinement scanning difficulty level according to the actual complexity value of the two-dimensional image, and determines an actual secondary refinement scanning speed according to the secondary refinement scanning difficulty level; and obtains a target secondary refinement scanning speed according to a comparison result of a coincidence value of the initial morphological three-dimensional image and a coincidence value of a standard morphological three-dimensional image. The present invention performs a refinement scanning on a target to be measured by adjusting the scanning speed of a scanning device, thereby improving scanning efficiency and increasing scanning clarity.

The utility model relates to the technical field of security door detectors, in particular to an adjustable metal detector for a security door, which comprises a security host and a mounting bracket, a motor buffer seat is arranged at the top of the mounting bracket, a servo motor is mounted on the inner side of the motor buffer seat, a threaded screw rod is fixedly connected to the tail end of an output shaft of the servo motor, and the threaded screw rod is fixedly connected with a nut. According to the safety check door metal detector, the threaded screw rod, the threaded sleeve, the metal detector body and the like are arranged to form a structure, so that the safety check door metal detector has the capability of comprehensively scanning a detected person from top to bottom; the problem that scanning is incomplete due to the fact that intervals exist among a plurality of metal detectors in a security check door is solved, a structure composed of an electric telescopic rod, a mounting frame and the like can scan detection persons of different body types, and the front faces and the back faces of the detection persons can be detected at the same time.

The embodiment of the invention provides a deep scanning method, electronic equipment, a storage medium and a program product. The method comprises the following steps: receiving a first message request sent by a client; determining a first scanning state corresponding to the first message request according to the first message request; circularly receiving an Nth message request sent by the client, and changing the first scanning state into a second scanning state after scanning of the cache file is completed; under the condition that the second scanning state is scanning ending, a cache file corresponding to the first message request is sent to the server, a state machine for sensing the scanning state is added and is used for maintaining the state and corresponding operation of a scanning service, multiple message requests can be processed under the condition of one-time long connection, all the scanning states can be identified, and the scanning efficiency is improved. The problem of deep scanning service failure in a long-connection multi-request scene is solved, the scanning efficiency is improved, and the scanning time is shortened.

The embodiment of the present application discloses a detection method, device, terminal device and storage medium for a wireless camera. The detection method may include: the scanning process of the channel to be scanned includes: capturing the data packets transmitted by the current channel to be scanned within the first time length; if the number of data packets transmitted on the current channel to be scanned captured within the first time length is greater than or equal to the data packet threshold, then continue to capture the data packets transmitted on the current channel to be scanned until the second time length is reached, and perform feature analysis on the captured data packets within the second time length, and determine the detection result for the wireless camera based on the feature analysis result; if the number of data packets captured within the first time length is less than the data packet threshold, then scan the next channel to be scanned until all channels to be scanned are scanned. By implementing this method, it is beneficial to shorten the channel scanning time of the terminal device, thereby improving the detection efficiency of the wireless camera.

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 utility model discloses an electromagnetic tracking scanning circuit and an electromagnetic touch control device, which comprise a processor, an X-direction filter and a Y-direction filter, and the X-direction filter and the Y-direction filter are connected with the processor and respectively comprise filter circuits with different filter frequency bands. The filter is used for accessing an electric signal in a corresponding direction and outputting an electric signal in a set frequency band, and the processor is used for receiving the filtered electric signal so as to position the electromagnetic pen. The filters comprising different filtering frequency bands are designed in the X direction and the Y direction, and electric signals in different frequency ranges can be accessed in each direction, so that the same scanning channels in the X direction or the Y direction can be combined, the scanning channels are reduced, the scanning time is saved, and the scanning speed is increased.

This application provides a multi-nucleus magnetic resonance imaging (MRI) device, belonging to the field of medical device technology. A multi-nucleus radio frequency (RF) transmitting unit is used to generate RF signals from at least two different nuclides. A gradient magnetic field unit is used to provide the gradient magnetic field required for spatial encoding. A multi-nucleus RF receiving unit is used to receive echo signals from different nuclides. A control unit is configured to adjust the timing sequence of the multi-nucleus RF transmitting unit, the multi-nucleus RF receiving unit, and the gradient magnetic field unit to achieve parallel excitation and synchronous reception of at least two different nuclides. Through the multi-nucleus RF transmitting unit, the gradient magnetic field unit, the multi-nucleus RF receiving unit, and the control unit in this application, parallel excitation of RF signals from at least two different nuclides and synchronous reception of echo signals from different nuclides are achieved, reducing the number of excitations and reception time required for imaging, improving imaging speed, and solving the problem of slow imaging speed in traditional devices.

The present invention provides a flat-panel CT machine, including a ray emitter and a flat-panel detector, which adopts 360° scanning or 180° scanning. The flat-panel detector uses a larger length and width than the flat-panel detector used for DSA, can cover a single part of the human body, and no longer needs spiral scanning; the scanning time is greatly reduced, which can effectively reduce motion artifacts; the radiation dose of the patient is greatly reduced; the spatial resolution and the number of longitudinal scanning layers are greatly improved, and it is a gapless scanning. The pulse control technology of X-ray emission is adopted to make the data obtained by the CT machine complete and without missing, and the image is clearer. Through pulse control technology or 180° scanning mode, the scanning frequency is reduced by half; pulse control technology can reduce the requirement for the mobility of the detector thin film transistor by about 10 times; by redesigning the number of detector array elements to further reduce the frequency, and control the inverter frequency of the ray emitter within an achievable range, the CT machine has the possibility of practical application.

The utility model relates to the technical field of recognition devices, and discloses a high-precision adjustable visual recognition device which comprises a workbench, a mounting seat is fixedly connected to the rear side of the top of the workbench, a driving assembly is fixedly connected to the inner wall of the bottom end of the mounting seat, and a supporting rod is rotationally connected to the middle of the bottom end of the mounting seat. A driven bevel gear is fixedly connected to the outer side of the supporting rod, the exterior of the driven bevel gear is in meshed connection with the exterior of the driving assembly, a threaded rod is fixedly connected to the top of the supporting rod, a protective shell is rotatably connected to the top of the threaded rod, and a sliding box is in threaded connection to the exterior of the threaded rod; the front end of the sliding box is fixedly connected with a supporting plate, and the bottom of the supporting plate is fixedly connected with a linear guide rail. According to the utility model, the height adjustment of the recognizer is realized, the clear recognition of articles is facilitated, the condition of fuzzy and unsuccessful recognition is avoided, and the use flexibility is improved.

The application discloses a reconstruction and segmentation integrated method based on K-space data of a magnetic resonance image, which comprises the following steps: acquiring undersampled K-space data of the magnetic resonance image, and pre-processing the undersampled K-space data; performing image reconstruction according to the pre-processed undersampled K-space data, and capturing long-distance dependence in K-space and image space in the process of image reconstruction to obtain a feature map of a reconstructed image; performing encoding processing on the feature map of the reconstructed image to obtain a feature map with feature position embedding; performing feature mapping on the feature map with feature embedding to make the dimension of the feature-mapped feature map same as that of the feature map of the reconstructed image; and performing decoding processing on the feature-mapped feature map to obtain and output a segmentation image. The application uses undersampled K-space data, can significantly shorten the nuclear magnetic resonance scanning time, and can output an accurate segmentation image result.

The invention provides a magnetic resonance image super-resolution reconstruction method and device and a terminal, and the method comprises the steps: inputting an obtained to-be-reconstructed low-resolution magnetic resonance image into a trained magnetic resonance image super-resolution reconstruction model, so as to reconstruct a corresponding high-resolution magnetic resonance image; the magnetic resonance image super-resolution reconstruction model comprises a shallow feature extraction module, a deep feature extraction module, a residual error and feature fusion module and a reconstruction module, wherein a high-low frequency feature fusion unit and a high-frequency feature guide unit are introduced into the deep feature extraction module. According to the method, the corresponding high-resolution magnetic resonance image can be obtained only by scanning the low-resolution magnetic resonance image, so that the scanning time is shortened, and the scanning efficiency is improved; the parameter quantity is effectively reduced, so that the network is lighter, and equipment with limited hardware resources is more friendly; the reconstruction model can better utilize high and low frequency features, thereby obtaining a high-resolution image with clear details and real organization structure features.

The invention relates to the technical field of three-dimensional modeling, in particular to an engineering laser point cloud rapid scanning method based on BIM model information, which comprises the following steps: S1, reading engineering BIM model information; s2, rasterizing an engineering scanning modeling area; s3, setting an engineering scanning modeling area; and S4, scanning path setting and inspection optimization. According to the method and the system, the basic characteristics and information of the to-be-modeled scene can be accurately acquired.

The present invention relates to the field of image processing technology, and in particular to an ultrasonic C-scan automatic alignment system based on virtual-real registration, comprising a three-axis moving device, an optical camera, a calibration plate and an ultrasonic probe, wherein the optical camera is mounted on a Z-axis fixing frame of the three-axis moving device, the optical camera is driven to move horizontally through the X-axis and Y-axis of the three-axis moving device, the ultrasonic probe is mounted on the Z-axis of the three-axis moving device, the calibration plate is placed on an underwater specimen table, and system processing is implemented based on a system method. The present invention can complete the automatic alignment and scanning process of an arbitrary position area, reduce manual alignment and scanning time for non-concern areas, and improve scanning efficiency.

The utility model discloses a wearable flexible knee joint inspection equipment, including flexible substrate, patch type ultrasonic device, transmission module, the flexible substrate is made of cloth material wearable knee -pad, is equipped with fixed device respectively at five positions of flexible substrate, and five positions correspond five inspection areas of knee joint, patch type ultrasonic device is fixed on the fixed device, including patch type ultrasonic probe, and each patch type ultrasonic probe is connected with transmission module through transmission line, and the degree of injury of knee joint soft tissue is monitored dynamically through ultrasonic imaging, transmission module is fixed on the upper end of flexible substrate, and one end is connected with patch type ultrasonic probe through transmission line, and the other end is connected external terminal through external connecting port, and the degree of injury of knee joint soft tissue monitored by patch type ultrasonic probe is transmitted to external terminal. The equipment can monitor the severity of knee injury in real time, establish standard operation procedure, can be grasped by non-ultrasonic professional health personnel, reduce the difference between operators.

The invention relates to an equipment connection method and device, electronic equipment and a storage medium. The method comprises the following steps: a first device sends first information in a broadcast mode, wherein the first information comprises information of a first channel occupied by the first device in a communication process; and a connection request sent by the second device is received, the connection request is that after the second device receives the first information, the first device is scanned on the first channel and sent through the first channel, and the connection request is used for requesting to establish communication connection between the first device and the second device. According to the method, when the channel where the first device is located is broadcasted, the method does not depend on a Bluetooth module and is more applicable, the second device directly scans on the channel where the first device is located, the scanning time is shortened, and the speed of establishing communication connection between the first device and the second device is increased.

The invention provides a rapid scanning system with a synchronous motion function, which comprises a pitching motion module and a horizontal motion module, and is characterized in that the pitching motion module moves in the pitching direction, and then at least drives a scanning device installed on the pitching motion module to execute synchronous follow-up pitching mechanical motion; the pitching motion module is arranged on the horizontal motion module, and the horizontal motion module at least drives the pitching motion module and the scanning device to execute synchronous follow-up horizontal mechanical motion while rotating in the horizontal direction; the pitching motion module and the horizontal motion module are arranged to be in a synchronous motion mode, and the pitching motion module synchronously moves in the pitching direction while the horizontal motion module does circular motion in the horizontal direction. The horizontal direction and the pitching direction of the scanning device are in a synchronous motion mode, so that the scanning period can be greatly shortened, and the scanning efficiency is improved.