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A method and system for adaptive medical ultrasound imaging sound velocity optimization and signal correction

An ultrasonic imaging, self-adaptive technology, applied in the medical field, achieves strong contrast, simple operation, and improved imaging quality

Active Publication Date: 2016-08-31
SASET CHENGDU TECH LTD
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Problems solved by technology

[0005] At present, there is no very effective method to estimate the sound velocity of each local segmented area, so it is impossible to talk about phase offset compensation for the difference between the optimal sound velocity and the system sound velocity for the echo signal of each channel in each segmented area

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  • A method and system for adaptive medical ultrasound imaging sound velocity optimization and signal correction
  • A method and system for adaptive medical ultrasound imaging sound velocity optimization and signal correction
  • A method and system for adaptive medical ultrasound imaging sound velocity optimization and signal correction

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Embodiment approach

[0039] A specific implementation is as follows:

[0040] An adaptive medical ultrasound imaging system sound velocity optimization and signal phase correction method, comprising the following steps:

[0041] 1) In the sound speed optimizer, different sound speeds are used to transmit ultrasonic waves to the same scanning part, and the iteration range of sound speed is 1450m / s~1640m / s, so as to obtain multiple RF signals corresponding to different sound speeds; figure 1 It is a system block diagram of the traditional B-mode ultrasound imaging standard, which includes five modules: beamformer (including dynamic focus optimization module), echo signal processor, scan converter, image processor, and display. On this basis, we add a sound velocity optimizer, this module is only opened when performing sound velocity optimization, refer to figure 2 .

[0042] 2) Perform baseband processing on the RF signal to generate a series of IQ signals corresponding to each sound velocity, an...

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Abstract

The invention discloses a sound velocity optimization and signal phase correction method in an adaptive medical ultrasound system imaging that can improve image quality and save time. The method first changes the emission sound velocity through multiple iterations in the sound velocity optimizer to obtain a series of The radio frequency signal is processed by the baseband to obtain the quadrature demodulation signal, and the image is obtained by performing spectrum analysis on the IQ signal, or by envelope and logarithmic compression calculation, and the texture analysis of the image is carried out to obtain the quality of the sound velocity. factor, find the best sound velocity, and set that sound velocity as the system sound velocity used for the current scan. At the same time, the image can be divided into several local areas to find the optimal sound velocity of the local area, so that in the echo focusing calculation, the phase of the optimal sound velocity and the system sound velocity difference can be calculated for the echo signal of each channel in each local segmented area Offset compensation for optimal focus.

Description

technical field [0001] The invention belongs to the technical field of medicine, relates to an ultrasonic imaging technology, in particular to an adaptive sound velocity optimization and signal phase correction method in medical ultrasonic system imaging. Background technique [0002] In the imaging system of medical ultrasound system, the speed of sound is one of the most important imaging parameters. When ultrasonic waves propagate in different tissues of the human body, the speed of sound will vary greatly. For example, when ultrasonic waves propagate in fat with a high body fat content, the sound speed is about 1450m / s, while the sound speed in muscles is about 1580m / s. The speed of sound of some muscle tissue can even be as high as 1640m / s. The current medical ultrasound system usually uses 1540m / s for dynamic delay focusing beamforming. However, when the ultrasonic wave whose sound speed deviates from the real sound speed passes through the local tissue, there will be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
Inventor 石丹刘东权
Owner SASET CHENGDU TECH LTD
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