Method and apparatus for improving hprf performance in doppler ultrasound imaging
A Doppler ultrasound and imaging technology, which is applied in the field of pulse wave spectral Doppler imaging, can solve the problems of reducing the signal-to-noise ratio of the target spectrum, which is not optimal, and is not desirable, so as to improve the signal-to-noise ratio and improve the imaging effect. Effect
Active Publication Date: 2014-10-15
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology
[0007] The disadvantage of the existing HPRF technology is that the above-mentioned PRF is a preset fixed gear. In actual application, only a certain gear is selected by the user for transmission and reception, and the actual sampling gate position is based on the target blood vessel or tissue of the target patient. It is determined by the position, which is arbitrarily variable
In some real sampling gate positions, these PRFs may cause the time when the target signal arrives at the probe to be too close to the pulse emission time, thereby reducing the signal-to-noise ratio of the obtained target spectrum and affecting the user's judgment on the acquisition of target speed information
That is to say, for some arbitrarily selected positions of real sampling gates, these preset PRFs may not be optimal or even desirable
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[0022] A method for improving HPRF performance in Doppler ultrasound imaging according to an embodiment of the present invention includes: an acquisition step 100 , a setting step 102 , and a scoring step 106 . In other embodiments, the sampling gate size judgment step 104 and / or the strengthening judgment step 108 are also optionally included, such as figure 1 shown. The steps are described in detail below.
[0023] First, obtain the parameters selected by the user interface, including sampling gate position information and obtain the PRF gear selected by the user interface (step 100), wherein the sampling gate position information includes: sampling gate depth SVD, i.e. figure 2 GateDepth in, and the sampling gate size GateSize, such as figure 2 shown. The sampling gate here is the real sampling gate, and the corresponding sampling gate depth is the real sampling gate depth. In addition, the standard PRF value corresponding to the PRF gear selected through the user int...
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The invention discloses a method and device for improving HPRF performance in Doppler ultrasound imaging, wherein the method includes: an acquisition step, which is used to acquire the PRF gear, sampling gate depth and sampling rate selected by the user through an interactive interface Gate size; setting step, used to set the optional PRF range according to the standard PRF value corresponding to the selected PRF gear; and scoring step, used to select the PRF in sequence according to the predetermined step in the optional PRF range for scoring; wherein The PRF with the highest score is used as the optimal PRF for the selected gear to transmit ultrasonic pulses. According to the method and device of the embodiment of the present invention, the optimal PRF is calculated in real time according to the PRF gear and the sampling gate position selected by the user for transmission, which can improve the signal-to-noise ratio of the Doppler spectrogram obtained under HPRF, thereby improving Imaging effect of Doppler spectrum.
Description
technical field [0001] The invention relates to pulse wave spectrum Doppler imaging, in particular to a method and device for improving HPRF performance in Doppler ultrasonic imaging. Background technique [0002] In the Pulsed Wave Spectral Doppler Imaging (PW imaging) process of the medical ultrasound imaging system, the ultrasound front-end transmits ultrasound pulse signals into the target tissue of the human body at regular intervals to detect its Doppler frequency shift ( Doppler Frequency Shift) information. In traditional PW imaging, in order to realize the target positioning function, that is, to ensure that the obtained velocity information does come from the target position (that is, the sampling gate depth (Sample Volume Depth, SVD)), the time interval of pulse repetition (Pulse Repeat Interval, PRI) will be limited by the depth of the target position, that is, the time interval PRI between two adjacent pulses must be greater than the time for the ultrasonic wav...
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IPC IPC(8): A61B8/00
CPCA61B8/488G01S7/5205G01S7/52019G01S15/8986A61B8/467
Inventor 李双双李雷
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD