30 results about "Plane wave imaging" patented technology

The invention discloses an ultrahigh-resolution ultrasonic plane wave imaging method based on SOFI. The method comprises the following steps: with the intervention of an ultrasonic contrast agent (micro-vesicle), conducting ultrasonic plane wave imaging on an imaged object, so that a group of ultrasonic plane wave images at different moments; conducting a filtering operation on all acquired ultrasonic plane wave images, so as to remove noise in the ultrasonic plane wave images; based on ultrasonic plane wave data, which just contains one micro-vesicle, in an imaging area, determining and calculating a transverse full width at half maximum FHWMx and a longitudinal full width at half maximum FHWMy, so as to obtain a transverse standard difference [gamma]x and a longitudinal standard difference [gamma]y, so that a point spread distribution model is generated; and finally, with the dynamic ultrasonic plane wave image obtained from filtering as input data, conducting calculating, so that anSOFI image of second-order (or high-order) balancing is obtained. With the application of the method provided by the invention, spatial resolution of the ultrasonic plane wave imaging can be greatlyimproved, and moreover, time resolution of the ultrasonic imaging can be also improved; and the ultrasonic plane wave imaging method is applicable to rapid ultrahigh-resolution ultrasonic imaging.

Plane Wave Imagers (PWI) directly sense the amplitude and phase of electromagnetic waves and do not require a lens to image a scene. PWI's can also be used in the exit pupil of an afocal lens. PWI's are implemented in CMOS using silicon waveguide technology. Since the wavelength of light ranges from less than one to tens of microns, PWI's fabricated on silicon are essentially flat plates, making a PWI a thin and light structure. A CMOS PWI can operate in the visible, near infrared, short wave infrared, and mid wave thermal spectral bands. Benefits of using a PWI include the ability to achieve large optical aperture performance by digitally processing the outputs of multiple small aperture PWI's that are not necessarily precisely optically aligned. Enhanced scene resolution can be obtained by collecting imagery from several adjacent positions and then digitally combining the digital data into one large dataset.

The invention provides methods and systems for ultrasonic imaging and microbubble imaging of plane waves based on compressive adaptive beam forming. The compressive adaptive beam forming algorithm is adopted, each array element receives useful frequency point information of data, and the useful frequency point information is all centralized in effective bandwidth of an ultrasonic echo signal, so that the data in the effective bandwidth is subjected to compressive sensing treatment instead of the whole frequency domain, and on the basis of frequency-domain adaptive beam forming, the number of frequency-domain sampling points is reduced and calculated amount required during beam forming is reduced; plane wave imaging is adopted, so that a problem of transient change of microbubbles in conventional ultrasonic imaging is solved; the whole microbubble distribution region is covered by emitting planar ultrasonic waves once, so that a microbubble distribution image in the whole imaging plane is obtained; microbubble imaging of ultrasonic plane wave emission is adopted, so that the time resolution on microbubble imaging is very high.

An ultrasonic imaging method and device, and a computer-readable storage medium, the method comprising: acquiring multi-angle imaging data during the plane wave imaging process, the multi-angle imaging data being imaging data at multiple deflection angles (S101); , calculate the correlation coefficient between the adjacent angle imaging data in the multi-angle imaging data, the adjacent angle imaging data is the imaging data corresponding to two adjacent deflection angles among the multiple deflection angles (S102); according to the correlation coefficient, the corresponding The enhancement coefficient of the positive correlation of the correlation of the adjacent angle imaging data, the enhancement coefficient is the coefficient corresponding to the multi-angle imaging data (S103); using the enhancement coefficient, the multi-angle composite data or the multi-angle imaging data are processed to obtain the enhanced image (S104) . The method can reduce the noise in the composite image and improve the contrast resolution of the composite image.

The invention discloses a fluorescent light sheet microscopic imaging system and method. The fluorescent light sheet microscopic imaging system includes a detection device, a correction device, an imaging device and a control device, wherein: the detection device is used to detect the wavefront of each preset isohalo region of the tissue plane imaging field of view inside the living sample aberration distortion, and send it to the control device, the control device is used to send correction instructions to the correction device according to the received wavefront aberration distortion, and the correction device is used to send correction instructions to the correction device according to the received The correction instruction is used to perform at least one wavefront correction on each of the isohales at the same time, and the imaging device is used to image the tissue plane after wavefront correction. The invention helps to obtain a deep biological tissue plane with a large field of view and high temporal and spatial resolution.

The invention discloses an anti-perspective plane transformation-based ultrasonic plane wave imaging method. The method comprises the following steps of (1) collecting data; (2) preprocessing the data: converting imaging points on an original imaging plane into imaging points on a new plane by utilizing plane conversion, calculating delay time according to the imaging points on the new plane to obtain corrected delay time, then receiving and focusing the imaging points on the original imaging plane by utilizing a synthetic aperture focusing technology according to the corrected delay time, and obtaining a value of each imaging point on the original imaging plane; and (3) post-processing the data: performing envelope detection, logarithmic compression and grayscale mapping in sequence, and finally obtaining an ultrasonic plane wave imaging image. According to the method, a key delay time calculation mode is improved and matched with the synthetic aperture focusing technology, so that compared with the prior art, the problem of low plane wave imaging quality can be effectively solved and the ultrasonic plane wave imaging resolution is effectively increased.

A Doppler measurement system includes a random generator outputting a control signal encoding a random selection, and an ultrasonic array transducer for emitting a sequence of transmit pulses at a target at either an adjustable steering angle (plane wave imaging) or from a selectable non-sequential transducer element order (synthetic aperture imaging) corresponding to the random selection and for receiving an echo of each transmit pulse reflected from the target. Each transmit pulse is independently adjusted to a steering angle (plane wave imaging) or selectable transducer element order (synthetic aperture imaging) corresponding to a unique random selection so that the sequence of transmit pulses is a random sweep. The system can also include a memory for storing echo data, and a processor connected to the memory for using transmit data and echo data to extract a Doppler parameter. Methods of Doppler measurement and computer-readable medium can incorporating the measurement system.

The invention discloses an ultrafast composite plane wave imaging method based on a broadband acoustic metamaterial. The method is realized by an ultrafast composite plane wave imaging device; the device includes a transmitting and receiving ultrasonic probe and an acoustic metamaterial structure. and Respectively receive the echo signal reflected by the measured object at the first preset receiving angle, the second preset receiving angle and the third preset receiving angle; the preset receiving frequency is n times the preset transmitting frequency; the first preset receiving The angle is equal to the first preset transmitting angle, the second preset receiving angle is smaller than the first preset transmitting angle, and the third preset receiving angle is larger than the first preset transmitting angle; the echo signal is used to reconstruct the image of the measured object. The invention can improve imaging depth and imaging quality.

The invention provides a planar ultrasonic imaging processing method and device based on virtual multi-angle composition at a receiving end, and aims to solve the problem that frame frequency and precision of single planar ultrasonic waves cannot meet the demand simultaneously in the prior art. According to the planar ultrasonic imaging processing method, received first echo data is subjected to virtual delaying, second echo data of receiving planes at different angles are obtained, and the second echo data of the receiving plane at each angle is subjected to beam forming according to the delay superposition principle, so that an image of the receiving plane at each angle is obtained; the images of the receiving planes at different angles are superposed, and a final image of the single planar ultrasonic waves is obtained. According to the single planar ultrasonic imaging processing method in the embodiment, single-pass planar wave emitting image quality is improved, planar wave emitting times are reduced, so that imaging frame frequency of the system is improved, and the method is compatible with a conventional method.