12results about How to "Reduced imaging time" patented technology

The invention discloses an XFCT (X-ray fluorescence computed tomography) imaging system based on a Thomson scattering X-ray source, and belongs to the technical field of X-ray imaging, the XFCT imaging system comprises a sample to be detected, an X-ray source module, a sample rotating table, a projection detection module, a sample attenuation detection module and an image reconstruction module; the system structure is adopted, the newly-arranged excitation source and the porous collimator are adopted, the imaging effect is improved, specifically, a Thomson scattering X-ray source is used as the excitation source of XFCT, and the source has the advantages of quasi-monochromaticity, adjustable energy, linear polarization, high brightness, compact structure and the like; the multi-hole collimator is used for collecting signals in parallel, and the sensitivity of the imaging system is remarkably improved while the resolution ratio is kept. The Thomson scattering X-ray source and the porous collimator are combined to be used for XFCT, and the imaging efficiency of the XFCT can be remarkably improved.

The invention relates to a photoacoustic microscopic imaging method and system. The method comprises the following steps: arranging a sample at a specified position; the spatial light modulator loads a phase diagram corresponding to the Gaussian light, scanning is carried out at a set rate, and an imaging result is obtained; selecting a region of interest according to the imaging result, and performing axial modulation imaging in the region of interest; in the axial modulation imaging process, the spatial light modulator loads 2N + 1 phase diagrams corresponding to non-sinusoidal modulation functions of different phases in sequence; phases corresponding to the 2N + 1 phase diagrams are as follows: N is the number of modulation frequencies; and reconstruction is carried out based on 2N + 1 one-dimensional photoacoustic signals obtained through axial modulation imaging scanning, and the photoacoustic signals after bandwidth expansion are obtained. According to the invention, the bandwidth of the photoacoustic signal can be expanded to GHz, an axial high-resolution imaging result is obtained, the data volume is reduced, the imaging time is shortened, and the imaging speed is improved.

The application discloses a kind of super-resolution imaging method and device based on quantum correlation photon parallel collection, the present application uses optical beam splitter to divide the fluorescence detected in microscope into two beams again into parallel detection system, two-way parallel detection can realize more efficient collection to fluorescence correlation photon pair after correction alignment, to reach better image quality.Compared with single parallel detection light path, the present application is used in quantum dot and solid defect with single-photon source characteristics;The present application can realize resolution improvement without improving laser power by using simple beam splitting second-order correlation measurement.Compared with existing quantum correlation imaging technology, the two-way parallel collection mode designed in the present application can perform coincidence measurement in space-time, and more coincidence photon information is retained, the imaging time is shortened, which can be applied in different super-resolution light paths, and the application range of quantum correlation photon detection technology is widened.

The invention provides a preparation method of a nanocapillary with an ion rectification effect and application of the nanocapillary, and particularly relates to application of the nanocapillary in improving the resolution ratio, the image quality and the scanning speed of a scanning ion conductance microscope (SICM). Ions are rectified and modified on the nano capillary to improve the resolution of the SICM, and meanwhile, the image quality and the scanning speed are improved well.

The invention relates to the field of large-view scenes, and provides a nonlinear optical large-view imaging system which comprises a light source system, a laser scanning system and a laser detection system. The light source system is used for emitting laser; the laser scanning system comprises a focusing lens and a galvanometer, the galvanometer is located between the focusing lens and the tested sample, the focusing lens is used for focusing laser to the tested sample, and the galvanometer vibrates according to a preset scanning angle to achieve scanning of a laser focus on the tested sample; the laser detection system comprises a compound eye type collection structure and a detector, the compound eye type collection structure comprises a plurality of closely arranged single lenses, and an optical signal generated by a detected sample enters the compound eye type collection structure; the detector is used for detecting the light signals collected by the compound eye type collection structure. The laser scanning imaging range can be expanded, it is guaranteed that laser beams are always spread along the optical axis of the focusing lens, signals excited by the whole scanning view field can be comprehensively collected, and the large-view-field imaging efficiency and the signal intensity are improved.

This invention provides a method and system for planning emergency missions for imaging satellites based on a synthesis strategy, relating to the field of imaging satellite mission planning technology. This invention can identify conflicts in the planning scheme for emergency missions. Under the condition of satisfying synthesis constraints, it synthesizes the selected emergency missions with the conflicting missions in the planning scheme, reducing the number of maneuvers and startups of the imaging satellite during mission imaging, as well as the number of shutdowns at the end of imaging, thereby increasing the chances of completing emergency missions and improving the effectiveness of emergency mission planning. When no synthesis constraints are satisfied, an emergency mission insertion strategy is executed. This allows the selected emergency missions to be inserted into conflict-free positions within the visible time window when there are many conflicts. Synthetic observation reduces the imaging time of the imaging satellite, improves the resource utilization efficiency of the imaging satellite, and reserves more idle imaging time slots for subsequent emergency mission scheduling.

This invention relates to the field of monitoring corrosion morphology and pH dynamic distribution in steel, and particularly to a rapid and intelligent monitoring method and system for in-situ monitoring of pitting morphology and surrounding pH dynamic distribution during electrochemical testing of steel pitting corrosion. First, an in-situ steel test sample with an observation surface is prepared and encapsulated, and then horizontally mounted in an adjustable electrolytic cell. Next, a methyl orange calibration solution with a pH gradient of 1-7 is prepared, and images of the sample at different pH values ​​are captured and imported into the system for calibration, establishing a quantitative mapping relationship between pH and the Lab values ​​of the calibrated images. Finally, in-situ electrochemical testing is conducted in a colorless salt test solution containing the same concentration of methyl orange, simultaneously monitoring the morphology of pitting initiation and development, as well as the dynamic evolution of the surrounding pH. This system can achieve millisecond-level dynamic in-situ monitoring of the spatial distribution of pH around pitting corrosion during the corrosion growth process, and can continuously capture real-time pH evolution information during the initiation and expansion of pitting corrosion.

The application discloses a method and device for determining kinetic parameters based on PET imaging, equipment and medium, the method comprises the following steps: determining the tracer output function according to the blood input function and the two-compartment dynamic model; according to the dynamic PET image set and the tracer output function, the model dynamic parameters of the two-compartment dynamic model are obtained by iterative solution; according to the model dynamic parameters, the kinetic parameter image is determined; wherein, the dynamic PET image set represents the PET image set within a preset time after tracer injection, the preset time is greater than or equal to 30 minutes and less than 60 minutes, the two-compartment dynamic model corresponds to the blood compartment and the tissue compartment, the blood input function represents the activity value of the tracer in the blood compartment at different scanning times, the tracer output function represents the sum of the activity value of the tracer in the blood compartment and the activity value of the tracer in the tissue compartment, which improves the inspection throughput and use efficiency of the PET imaging equipment.

This invention provides a three-dimensional full-focusing ultrasound imaging method based on a frequency-wavenumber domain row-column addressable array, belonging to the field of three-dimensional full-focusing ultrasound. The method includes the following steps: using a row-column addressable array with a total of N+N transmitting elements to perform ultrasonic scanning on a medium to obtain acquired signals; based on the acquired signals, performing spatial sampling to obtain a three-dimensional voxel network; using a frequency-wavenumber domain method to beamform the radio frequency data corresponding to the three-dimensional voxel network; and performing envelope processing on the beamformed data to form a three-dimensional image. This invention's beamforming method for three-dimensional full-focusing ultrasound imaging based on a frequency-wavenumber domain row-column addressable array significantly reduces the number of elements and beamforming channels required for three-dimensional imaging by using a row-column addressable array, while providing a larger imaging area. The imaging process employs full-matrix capture to obtain high-resolution images, and the frequency-wavenumber domain beamforming method significantly shortens the imaging time.

The application discloses a helical line multi-point amplification sampling photoacoustic volume imaging method and system, and belongs to the technical field of photoacoustic volume imaging. In step S1, signal amplification training data set is acquired; the imaging area of a biological tissue or a phantom sample is adjusted to be located in a set sound field range of a three-dimensional bowl-shaped ultrasonic array, three-dimensional photoacoustic volume imaging is performed on the biological tissue or the phantom sample to obtain non-rotation scanning sparse data, a pre-amplification photoacoustic chord diagram and a post-amplification photoacoustic chord diagram; in step S2, an interpolation network is constructed and trained; a U-Net interpolation network is constructed, the pre-amplification photoacoustic chord diagram is taken as input, the post-amplification photoacoustic chord diagram is taken as a real label for training, error analysis training is performed, and an optimal interpolation model with minimum error is saved. The application replaces traditional multi-rotation angle physical rotation scanning by using deep learning virtual amplification sampling technology, significantly shortens imaging time, realizes high-speed three-dimensional imaging under single-pulse excitation, and is suitable for real-time dynamic monitoring scenes.

This invention discloses a multi-channel light-slice microscopic imaging device. The image acquisition module includes multiple image detectors. A laser array emits multiple excitation beams of different wavelengths, which are then combined into a single incident beam by an optical path module. This incident beam passes through a scanning galvanometer and an imaging module before illuminating the sample on a stage mounted on a three-dimensional displacement platform. The imaging objective in the imaging module collects fluorescence signals from the sample, which are then split by the beam-splitting module to form multiple fluorescence signals of different wavelengths and projected onto the multiple image detectors. Each image detector forms an image imaging channel. Multiple image imaging channels receive multiple fluorescence signals of different wavelengths and transmit them to the corresponding image detectors. The three-dimensional displacement platform enables three-dimensional displacement movement of the sample slice. By employing a strategy of continuous motion imaging of the sample slice and simultaneous detection and acquisition of fluorescence signals by multiple image detectors, the time interval between sample preparation and imaging, as well as the pauses during imaging, can be reduced.

The application discloses a spectral super-resolution method based on a variational autoencoder, and comprises the following steps: inputting a target RGB image into a first convolutional layer of a spectral super-resolution network to obtain a plurality of feature maps containing shallow layer features corresponding to the target RGB image; inputting the feature maps into an attention mechanism module of the spectral super-resolution network to perform feature mapping on the feature maps; inputting the feature maps subjected to the feature mapping into a second convolutional layer of the spectral super-resolution network to reconstruct a target hyperspectral image corresponding to the target RGB image; and training the spectral super-resolution network according to a first hyperspectral image and a first RGB image extracted by the variational autoencoder, wherein the first hyperspectral image is reconstructed by the untrained spectral super-resolution network on the basis of a training RGB image. The target RGB image is acquired by a common camera, so that the image acquisition difficulty is low, and the hyperspectral image is reconstructed by the spectral super-resolution network, so that the imaging time is short, and the method can be widely applied to the field of spectral super-resolution.