37results about How to "Improving the imaging rate" patented technology

The invention discloses an all-electrically controlled dual-Stokes optical wavelength tuning device, comprising a femtosecond laser (1), an ultrashort pulse power and polarization state adjustment part, a highly nonlinear polarization-maintaining photonic crystal fiber (7), an optical fiber Collimating beam expander (8), optical filter (9), dual Stokes optical pulse delay adjustment part and CARS microscopic imaging system (18), using the soliton self-silicon in highly nonlinear polarization-maintaining photonic crystal fiber The frequency shift effect produces optical solitons whose wavelength can be continuously adjusted in a large range and uses them as Stokes optical pulses. The short-pulse optical power and linear polarization direction can realize the independent and flexible adjustment of the fast axis and slow axis optical soliton wavelengths. The invention enhances the tuning stability of the excitation source of the CARS microscopic imaging system, realizes independent and flexible adjustment of double Stokes wavelengths, and improves the imaging rate of the CARS microscopic imaging system.

The invention discloses a rifling barrel-shaped scanning device, and relates to the field of security inspection devices. The rifling barrel-shaped scanning device comprises a main frame, an azimuth rotation mechanism, a central mechanism, a computer and a lifting movement mechanism. The lifting movement mechanism comprises a fixing seat, a screw mounting seat, a guiding seat, a screw rod, a lifting sliding table, a servo motor a and a synchronous belt transmission device, and is used for driving the azimuth rotation mechanism and the central mechanism to lift. The azimuth rotation mechanism comprises a servo motor b which is connected with a square shaft. The center mechanism comprises a central vertical shaft which is connected with the square shaft. A number of antenna beams and radomebeams are arranged on the central vertical shaft in the axial direction. A number of transmitting antennas and receiving antennas are arranged between the antenna beams through antenna fixing plates.The computer is electrically connected with the transmitting antennas, the receiving antennas, the servo motor a and the servo motor b. The device has the advantages of compact structure, wide scanning range, high scanning efficiency, large scanning precision, high stability and high security inspection efficiency, and can be widely used in the field of security inspection.

The invention relates to a high-speed calculation correlated imaging system and method based on a preset modulatable light source.The imaging system comprises the light source, an electro-optical modulator array modulating system, a single-point light intensity detector, a data collecting module and a data synchronizing and processing module; the electro-optical modulator array modulating system is used for performing random binary intensity modulation on light emitted by the light source to form a light field with intensity distributed in a random fluctuation mode in free space; the single-point light intensity detector is used for detecting total light intensity obtained after the light field is reflected or transmitted by a target object to be detected and converting the total light intensity into electric signals related to the total light intensity; the data collecting module is used for obtaining the electric signals and obtaining total light intensity fluctuation information, the data synchronizing and processing module is used for controlling data synchronization between the electro-optical modulator array modulating system and the data collecting module and then conducting correlation calculation to obtain an image of the target object to be detected.The electro-optical modulator array modulating system is used for modulating light, the modulation speed is high, the refreshing frequency effect of the preset light source is improved, the refreshing frequency is at least improved to megahertz order, and imaging result and imaging quality are improved.

The invention discloses a nuclear magnetic resonance T2 image imaging method provided by the invention, which includes the following steps: Step 1, setting a pulse sequence, and the pulse sequence adopts a fast spin echo sequence. Step 2: Carry out nuclear magnetic resonance test and collect echo signals in the echo chain; the number of echo signals is required to cover the signal intensities at different time points in the transverse relaxation of the measured substance. Step 3, taking the corresponding signal strengths at different time points as K-space data and performing image reconstruction. Step 4: Obtain the MR signal intensity of each excited voxel in the position space by Fourier transforming the image data in the K space. Step five, calculating the T2 value of each excited voxel. The invention can reduce the scanning time and increase the scanning speed, and is suitable for the inspection of autonomous moving organs.

The present invention provides a magnetic resonance interventional imaging method, system, and medium based on low-rank and sparse decomposition, including: step 1: during the intervention process, continuously collect k-space data by using the golden angle radial sampling method; step 2: The collected k-space data are grouped; Step 3: The method based on low-rank and sparse decomposition and framelet transformation is used to reconstruct the magnetic resonance interventional image. The present invention is based on grouping k-space collection and reconstruction, can carry out reconstruction under the condition of less data collection, has high time resolution and good real-time performance.

The invention provides a super-resolution structure detection array confocal fluorescence imaging device and an imaging method thereof, relating to imaging devices and imaging methods thereof and aiming to solve the problems that the resolution of the existing confocal limiting technology is difficult to increase and confocal images are not clear. The device comprises a laser source, wherein a collimator and beam expander, a beam splitter prism, a 1 / 4 wave plate, a scanning system, an illumination objective, a fluorescent sample, a collecting lens and a CCD (charge coupled device) detector are arranged along the ray propagation direction of the laser source in sequence. The device has the effects that integration is carried out on a detection plane to change the light sensitivity of a corresponding detecting location; the OTF (optical transfer function) bandwidth of a system is expanded; the spatial cut-off frequency of a confocal fluorescence imaging system is improved and the spatial frequency domain bandwidth is expanded, thus obviously improving the lateral resolution of the imaging system; and the device is applicable to the measurement field of industrial topographic imaging.

A high-speed image sensor whose frame rate can reach the bandwidth limit rate belongs to the technical field of VLSI electrical components. It can complete the analog-to-digital conversion process in parallel at the pixel level, and is equivalent to a binary digital data after the analog-to-digital conversion is completed. The storage array can be directly and seamlessly grafted on the high-speed data reading and transmission technology used in the existing memory system. Since the image exposure process and the image data reading and transmission process are independent of each other, they can be overlapped in time. Therefore, its imaging rate and frame rate can reach the limit rate allowed by the digital data transmission bandwidth. The present invention also provides an improved solution to separate the exposure process and the analog-to-digital conversion process independently, so that the exposure process and the analog-to-digital conversion process can be overlapped in time sequence, and the exposure time can be maximized. The invention can output image data with arbitrary precision, and can be directly combined with a processor to form high-speed image shooting.