14 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 provides an image processing method and device, electronic equipment and a computer readable medium, and relates to the technical field of intravascular imaging. The method is applied to an intravascular ultrasound system and comprises the following steps: responding to a switching action of a time gain compensation switch, and recording the action time and the gain level of the switching action; acquiring echo data corresponding to the action time; determining target noise data corresponding to the gain level from a preset time gain compensation switching noise table; subtracting the noise data from the echo data to obtain final image data; according to the method and the device, the time of the switching action of the time gain compensation switch and the corresponding gain level are positioned, the noise data are determined in the preset time gain compensation switching noise table, and the noise data are correspondingly subtracted from the echo data, so that the influence of noise is eliminated, and the user experience is improved.

This application relates to an ultrasound image gain compensation method, apparatus, device, and medium. The method comprises acquiring a first ultrasound image to be compensated; inputting the first ultrasound image to be compensated into a gain compensation model to obtain a time gain compensation curve and a lateral gain compensation curve; and performing gain compensation on the first ultrasound image to be compensated based on the time gain compensation curve and the lateral gain compensation curve to obtain a target ultrasound image. The ultrasound image gain compensation method provided in this application eliminates the need for manual user adjustment, thereby reducing user workload and working time.

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.

The invention discloses an analog front-end chip for ultrasonic imaging digital beam forming. The circuit comprises a low noise amplifier (LNA) and an analog-to-digital converter (ADC). The noise amplifier LNA comprises a programmable gain amplifier PGA and an output stage amplifier; the main structure of the PGA is a pseudo-differential capacitance feedback amplifier, and the function of time gain compensation TGC is achieved by changing the proportion of input capacitance and output capacitance. The output-stage amplifier is a two-stage amplifier, and the first-stage operational transconductance amplifier OTA is of an Inver-Based structure; the OTA at the second stage adopts a class-AB structure; the OTA of the first stage and the OTA of the second stage use independent common-mode feedback; a closed-loop structure of the output-stage amplifier is realized by adopting a split capacitor structure; according to the invention, digital-to-analog conversion of a single channel is realized by adopting the SAR ADC, and the analog front end for ultrasound with a high dynamic range and a high signal-to-noise ratio is realized with relatively small power consumption and area.

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.

A portable ultrasonic device and a control panel of the ultrasonic device are characterized in that according to the layout of a traditional control panel, structures such as a pulling rod, a sliding rod, a trackball, a knob and the like which occupy a large space are redesigned, for example, a plurality of time gain compensation assemblies associated with a time gain compensation curve are arranged in a first operation area; the time gain compensation assembly comprises a first touch area for an operator to touch and operate, the first touch area comprises a plurality of first sub-touch areas distributed in the long axis direction, each first sub-touch area corresponds to one gain, and any first sub-touch area can generate a time gain setting signal when being touched by the operator. The time gain setting signal is used for setting the gain, corresponding to the depth of the time gain compensation component where the first sub-touch area is located, on the time gain compensation curve to be the gain corresponding to the first sub-touch area. The control panel is beneficial to light and thin design and waterproof and dustproof design.

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.

The invention discloses a high-precision fetal heart monitoring device in the technical field of fetal heart monitoring, and the device comprises a multi-mode sensing module which is used for collecting fetal heart signals, maternal movement data and maternal body surface feature information, and calculating the abdominal fat thickness and skin elasticity coefficient of a pregnant woman; the self-adaptive compensation module is used for carrying out interference classification on signals, tracking position changes of a fetus in a maternal body in real time, compensating position signals of the fetus in combination with a deep learning model, correcting signal deviation caused by movement of the fetus and movement of the maternal body through a prediction algorithm, and outputting the corrected signal deviation. The ultrasonic transmitting power and the time gain compensation curve are dynamically adjusted based on the abdominal fat thickness; and the visualization module is used for visually displaying the fetal heart rate curve, the movement trend and the positioning information. According to the invention, high-precision fetal heart electrical activity monitoring can be realized in complex scenes (such as pregnant woman exercise and obese constitution), and reliable data support is provided for early diagnosis of fetal arrhythmia.

The present embodiments relate generally to ultrasound imaging systems and methods that provide a user interface on the touchscreen display. The user interface includes an ultrasound image feed and a single control for modifying imaging depth of the ultrasound image feed. When input via the single control is received to modify the imaging depth, the system: adjusts frequency of ultrasound signals being used to acquire the ultrasound image feed; adjusts a beamformer parameter of the ultrasound signals being used to acquire the ultrasound image feed; receives first image data of the ultrasound image feed based on the adjusted frequency and the adjusted beamformer parameter; based on the first image data, adjusts Time Gain Compensation (TGC) of the ultrasound image feed; and receives second image data of the ultrasound image feed based on the adjusted frequency, beamformer parameter and TGC. Display of the second image data on the touchscreen display is then optimized without receipt of additional user input.