8 results about "Time gain compensation" patented technology

The invention relates to the technical field of ultrasonic signal processing, in particular to an ultrasonic data processing method and system and electronic equipment, and the method comprises the steps: obtaining an original ultrasonic echo signal, and carrying out the time gain compensation, band-pass filtering and down-sampling preprocessing; extracting dynamic frequency dispersion characteristic parameters based on Coann class time-frequency distribution; constructing a depth self-adaptive phase compensation model, and correcting nonlinear phase distortion segment by segment; hilbert transform is adopted to extract an envelope, and after logarithmic compression and linear mapping are carried out, image reconstruction is completed by utilizing delay summation beam forming and an adaptive contrast enhancement algorithm. According to the method, the imaging definition is improved through cooperation of frequency dispersion modeling and phase correction, and the method has good depth adaptability and image visualization effect and is suitable for high-precision image acquisition requirements in scenes such as medical ultrasonic imaging and industrial nondestructive testing.

The invention discloses an experimental animal intracerebral target accurate injection system and method based on artificial intelligence and ultrasonic guidance, and relates to the technical field of target injection, the system comprises an ultrasonic probe for emitting ultrasonic waves, receiving experimental animal craniocerebral echo signals and outputting radio frequency signal data; the image processing module is used for executing time gain compensation and beam forming on the radio frequency signal data and outputting gray scale image data and blood flow image data; the artificial intelligence reasoning module is used for inputting the gray-scale image data and the blood flow image data into a convolutional neural network model and outputting corresponding coordinates; the path planning unit is used for generating an entry point coordinate, an angle parameter and a depth parameter through an optimization algorithm; the puncture guide frame adjusts the spatial position of the puncture needle according to the angle parameter and the depth parameter; and the needle point tracking unit is used for calculating a deviation value between the needle point coordinate and a preset track and generating an early warning signal. The problem of inaccurate positioning caused by individual difference in a traditional method is fundamentally solved.

An ultrasound imaging system includes a transducer array configured to transmit in a first transmission mode or a split transmission mode in which an original transmission of the first transmission mode is split into multiple transmissions for each scanline. The system further includes a beamformer configured to beamform an echo signal corresponding to the original transmission or a combination of echo signals corresponding to the multiple transmissions. The system further includes a scanline processor configured to adaptively apply digital time gain compensation to each scanline, wherein a first gain is applied to a scanline corresponding to a transmission traversing tissue and a second gain is applied to a scanline corresponding to a transmission traversing a water standoff. The system further includes a controller configured to switch from the first transmission mode to the split transmission mode in response to detecting water standoff enhancement artifact.

This application relates to the field of ultrasonic testing technology, and discloses a method for adjusting the time gain of an ultrasonic system, comprising: calculating the gray-level distribution slope of an initial ultrasonic image; determining the attenuation coefficient of the ultrasonic signal in the ultrasonic system based on the gray-level distribution slope; calculating the time gain compensation of the ultrasonic system using the attenuation coefficient; and adjusting the time gain of the ultrasonic system based on the time gain compensation. In the embodiments of this disclosure, after acquiring the initial ultrasonic image, the attenuation coefficient of the ultrasonic signal is deduced by calculating the gray-level distribution slope, the time gain compensation is calculated, and the time gain of the ultrasonic system is adjusted under the time gain compensation to reacquire the ultrasonic image. Because the time gain compensation is derived from the initial ultrasonic image, it is more suitable for the current scanning situation and can make the reacquired image clearer. This application also discloses a device and ultrasonic equipment for adjusting the time gain of an ultrasonic system.

The invention relates to the technical field of radar speed measurement, and discloses a radar speed measurement method based on gain control, comprising the following steps: S1, system initialization and gain calibration: pre-testing loop stability; s2, signal transmitting and echo receiving: transmitting and receiving a dynamic gain control echo signal; s3, high-speed signal acquisition and synchronization: acquiring I / Q channel data; s4, Doppler processing and dynamic gain compensation: Doppler frequency is extracted; s5, Doppler peak value detection and speed calculation: detecting a target peak value, and calculating a target speed; s6, dynamic performance verification: carrying out a multi-target scene test and an anti-interference test; s7, boundary condition robustness test: carrying out extreme environment test and overload recovery test; and S8, calibrating and outputting data. Through real-time gain compensation of digital automatic gain control and robust Doppler processing, high-precision speed measurement can still be realized under the conditions of strong clutter, interference and rapid gain change, the stability is good, and the influence of the environment is small.

A method for controlling a plurality of time gain compensation physical switches. The method includes: performing a current ultrasonic scan; determining current positions of the plurality of TGC physical switches; determining target positions of the plurality of TGC physical switches; and simultaneously displaying the current positions and the target positions of the plurality of TGC physical switches on a display. Some other embodiments of the present application further provide a system for controlling a plurality of time gain compensation physical switches, and a non-transitory computer-readable medium.

The invention relates to a gain compensation method for a focal plane movement in a wide-temperature environment. The method comprises the following steps: dividing non-uniform temperature subintervals in a wide-temperature range; fitting in each temperature subinterval by adopting a Chebyshev polynomial, establishing a gain prediction model of each temperature subinterval, and determining a gain compensation coefficient calculation relation of each temperature subinterval based on the gain prediction model; acquiring the working temperature of the focal plane array in real time; determining a temperature subinterval to which the working temperature belongs according to the working temperature collected in real time, calling a gain compensation coefficient calculation relation corresponding to the temperature subinterval, and calculating a real-time gain compensation coefficient in combination with a lookup table and linear interpolation; and applying the real-time gain compensation coefficient to an original output signal of the focal plane movement to realize gain compensation. According to the invention, image artifacts and contrast reduction caused by wide temperature change are effectively suppressed, the image uniformity is improved, the temperature measurement precision is improved, and the working stability and output reliability of a focal plane movement in a severe temperature environment are improved.

An ultrasound imaging system (102) includes a transducer array (110) configured to transmit in a first transmission mode or a split transmission mode in which an original transmission of the first transmission mode is split into a plurality of transmissions for each scan line. The system also includes a beamformer (124) configured to beamform an echo signal corresponding to the original transmission or a combination corresponding to the plurality of transmitted echo signals. The system also includes a scan line processor (128) configured to adaptively apply digital time gain compensation to each scan line, where a first gain is applied to the scan line corresponding to transmission through the tissue and a second gain is applied to the scan line corresponding to transmission through the water balance. The system also includes a controller (142) configured to switch from the first transmit mode to the split transmit mode in response to detecting the water balance enhancement artifact.