Continuous Doppler signal treatment device and method

A Doppler signal and processing device technology, which is applied in the field of ultrasonic imaging equipment, can solve the problems of easy saturation of I/Q demodulators, achieve the effects of reducing the probability of saturation, improving the signal-to-noise ratio, and increasing the number of channels

Inactive Publication Date: 2010-09-15
深圳蓝影医学科技股份有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a continuous Doppler signal processing device and processing method to overcome the I / Q demodulation problem of the continuous Doppler imaging system in the prior art when beamforming the continuous Doppler signal. The defect that the device is easy to saturate

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  • Continuous Doppler signal treatment device and method
  • Continuous Doppler signal treatment device and method
  • Continuous Doppler signal treatment device and method

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[0023] Below according to accompanying drawing and embodiment, the present invention is described in further detail:

[0024] like figure 2 , image 3 , Figure 4 and Figure 5 As shown, the continuous Doppler signal processing device of the present invention includes N (the optimal value of N is an integer power of 2) pre-low noise amplifiers LNA, and the number of I / Q amplifiers is the same as the number of pre-low noise amplifiers LNA. The demodulator, the first beamformer and the second beamformer, the output end of each pre-low noise amplifier is connected to a different input end of the I / Q demodulator, and the output end of each I / Q demodulator is connected. The I signal output terminal is connected to the input terminal of the first beamformer, and the Q signal output terminal of each I / Q demodulator is connected to the input terminal of the second beamformer. The output end of the first beamformer is connected to the first bandpass filter, the output end of the s...

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Abstract

The invention discloses a continuous Doppler single processing device and a processing method. The processing device comprises at least two preposed low noise amplifiers (LNA), I / Q demodulators with the quantity equal to that of the preposed LNA, a first wave-beam synthesizer and a second wave-beam synthesizer. The output end of every preposed LNA is connected to the input end of a opposite I / Q demodulator; the I signal output end of every I / Q demodulator is connected with the input end of the first wave-beam synthesizer; and the Q signal output end of every I / Q demodulator is connected with the input end of the second wave-beam synthesizer. The processing method comprises the following steps: A1. an echo signal is pre-amplified by the preposed LNA; A2. every path of the pre-amplified signal is conducted with I / Q demodulation; A3. the I signal and the Q signal are respectively conducted with wave-beam synthesis; and A4. the synthesized signal is conducted with module transformation after wave filtering.

Description

technical field [0001] The invention relates to the technical field of ultrasonic imaging equipment, in particular to a continuous Doppler (CW Doppler) signal processing device and a processing method. Background technique [0002] The CW mode in the Doppler imaging system usually works like this: part of the array elements of the probe are used for transmission, and the other part of the array elements are used for reception. In this way, the pulsed waveform can be transmitted continuously, so that the CW mode does not suffer from spectral aliasing as in the pulsed Doppler (PW) mode. In this way, CW can be used for the measurement of blood flow signals with high flow velocity. [0003] But CW usually has a problem: because the transmission and reception are carried out at the same time, the echo signal received by CW is usually relatively large, especially the signal in the near field. However, when the echo signals of multiple channels are subjected to beamforming (beamf...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/06
Inventor 兰海蒋颂平
Owner 深圳蓝影医学科技股份有限公司
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