Method and device for automatically optimizing Doppler imaging parameters

Abstract

The invention provides a method and a device for automatically optimizing Doppler imaging parameters. The method comprises: an acquiring step used for acquiring at least two characteristic spectral lines under a predetermined pulse repetition frequency; a storage step used for storing the at least two characteristic spectral lines; and an optimizing step used for optimizing at least one of the Doppler imaging parameters based on the stored at least two characteristic spectral lines and a predetermined noise average power. In the predetermined time, the acquiring step acquires the at least twocharacteristic spectral lines by acquiring Doppler spectral lines under the predetermined pulse repetition frequency in real time and processing the acquired Doppler spectral lines in real time without storage. Compared with the prior art, the method and the device realize automatic optimization of the Doppler imaging parameters only by storing and processing the two characteristic spectral linesand the predetermined noise average power, thereby having the advantages of few occupied resource, low complexity and good stability.

Description

technical field [0001] The present invention relates to the field of ultrasound imaging, and more particularly, to a method and device for automatically optimizing Doppler imaging parameters for an ultrasound imaging system. Background technique [0002] Pulsed Wave Doppler (Pulsed Wave Doppler, PW) technology is widely used in the nondestructive detection and measurement of human blood flow. It can observe the blood flow characteristics of a specific area of ​​the human body, and obtain the blood flow velocity and distribution. [0003] figure 1 A typical Doppler imaging parameter optimization block diagram is shown. In PW measurement, the operator generally sets a sampling gate at a certain position in the patient's two-dimensional ultrasound image, and then transmits an ultrasonic signal to the scanning position where the sampling gate is located. The ultrasonic signal injected into the human body reaches the receiving transducer after being scattered by human cells. T...

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Problems solved by technology

The principle of the method described in this patent is simple, but the algorithm is susceptible to noise interference. For example, when there are speckle-like interference signals in the Doppler spectral line, it will cause misjudgment. situation, the algorithm cannot correctly determine whether an aliasing has occurred

[0010] In the patent document US2007016073[4], a template matching method is introduced to judge whether multiple aliasing occurs in the Doppler spectrogram. After having a large number of Doppler spectrogram templates, the The accuracy of the algorithm is high, but due to the diversity of Doppler spectrogram forms, a large number of Doppler spectrogram templates need to be collected. In addition, some special Doppler spectrograms that do not exist in the template library , the effect of template matching is not sure

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