Method and system for simultaneously displaying a doppler image, a B-mode image, and a color blood flow image

1. A method for simultaneously displaying a Doppler image and a color blood flow image, comprising:

switching a transceiver module into a transmitting state;

transmitting a Doppler scanning pulse via an ultrasound transducer;

switching the transceiver module into a receiving state;

receiving an ultrasonic echo of the scanning pulse and converting the ultrasonic echo into an electric signal via the ultrasound transducer;

performing Time Gain Compensation (TGC) amplification on the converted electric signal via a Time Gain Compensation (TGC) amplifier;

performing beamforming on the amplified electric signal via a beamforming module;

performing Doppler signal processing on the signal obtained by the beamforming to acquire Doppler frequency spectrum data via a Doppler signal processing module;

performing color blood flow signal processing on the same signal which is used to acquire the Doppler frequency spectrum data to acquire color blood flow image data via a color blood flow signal processing module; and

sending the acquired Doppler frequency spectrum data and the color blood flow image data to a display module, and synchronously displaying the Doppler frequency spectrum data and the color blood flow image data via the display module.

2. The method of claim 1 , wherein the Doppler signal processing comprises:

performing quadrature demodulation on the signal obtained after the beamforming to acquire an in-phase component signal and a quadrature component signal;

performing range gating on the in-phase component signal and the quadrature component signal, respectively;

performing wall filtering on a signal resulting from the range gating;

estimating a power spectrum of the signal after the wall filtering; and

performing compression processing on the estimated power spectrum to compress the estimated power spectrum into a grayscale display range, so as to acquire the Doppler frequency spectrum data capable of being displayed.

3. The method of claim 2 , wherein, after performing compression processing on the estimated power spectrum, the method further comprises:

performing automatic envelope detection on the compressed power spectrum data to automatically trace changes of a blood flow peak speed and a blood flow average speed with time.

4. The method of claim 2 , further comprising:

performing sound analysis processing on the data after the wall filtering to form forward blood flow sound data and reverse blood flow sound data; and

performing digital to analog conversion on the forward blood flow sound data and the reverse blood flow sound data to produce a forward blood flow sound and a reverse blood flow sound.

5. The method of claim 2 , wherein the wall filtering is a high-pass filtering.

6. The method of claim 1 , wherein performing the color blood flow signal processing comprises:

performing quadrature demodulation on the signal obtained after the beamforming to acquire an in-phase component signal and a quadrature component signal;

performing data extraction on the in-phase component signal and the quadrature component signal;

performing wall filtering on data resulting from the extraction;

performing blood flow parameter estimation on the data after the wall filtering to acquire a current blood flow speed, a variance, and energy; and

performing frame correlation and smoothing on estimated blood flow information to acquire the color blood flow image data.

7. The method of claim 6 , wherein, before the data extraction is performed, range gating is performed on the in-phase component signal and the quadrature component signal respectively.

8. The method of claim 1 , wherein the scanning pulses are wide beams.

9. The method of claim 1 , wherein the ultrasonic echo is received by using a multi-beam technology.

10. A method for simultaneously displaying a B-mode image, a Doppler image, and a color blood flow image, comprising:

switching a transceiver module into a transmitting state;

transmitting a B-mode scanning pulse and a Doppler scanning pulse alternately according to a time sequence via an ultrasound transducer;

switching the transceiver module into a receiving state;

receiving ultrasonic echoes of the scanning pulses and converting the ultrasonic echoes into an electric signal via the ultrasound transducer;

performing Time Gain Compensation (TGC) amplification on the converted electric signal via a Time Gain Compensation (TGC) amplifier;

performing B-mode signal beamforming on a B-mode ultrasonic echo via a B-mode signal beamforminq module and performing Doppler signal beamforming on a Doppler ultrasonic echo via a Doppler signal beamforminq module;

sending a signal resulting from the B-mode signal beamforming to a B-mode signal processing module to acquire B-mode image data;

performing Doppler signal processing on a signal obtained by the Doppler signal beamforming to acquire Doppler frequency spectrum data via a Doppler signal processing module;

performing color blood flow signal processing on the same signal which is used to acquire the Doppler frequency data to acquire color blood flow image data via a color blood flow signal processing module; and

sending the B-mode image data, the Doppler frequency spectrum data, and the color blood flow image data to the display module, and synchronously displaying the B-mode image data, the Doppler frequency spectrum data, and the color blood flow image data via the display module.

11. The method of claim 10 , wherein a time sequence for transmitting B-mode scanning pulses and Doppler scanning pulses comprises: transmitting the Doppler scanning pulses first, where a time interval between every two Doppler scanning pulses is fixed; then inserting at least one B-mode scanning pulse according to the time interval between the adjacent two Doppler scanning pulses; combining all of the B-mode scanning pulses to complete scanning of a B-mode image; and combining all of the Doppler scanning pulses to complete scanning of a Doppler image.

12. The method of claim 10 , wherein a time sequence for transmitting B-mode scanning pulses and Doppler scanning pulses comprises: transmitting a segment of the Doppler scanning pulses first, and a period of time is selected from scanning time for completing a Doppler image for transmitting the B-mode scanning pulses instead of the Doppler scanning pulses.

13. The method of claim 12 , wherein, for processing of Doppler signals, information of interrupted scanning pulses is estimated according to neighboring Doppler scanning pulses, so as to acquire normal continuous Doppler signals.

14. The method of claim 12 , wherein, for processing of color blood flow signals, normal continuous Doppler signals of a non-gap segment are selected for processing, so as to acquire a correct color blood flow image.

15. The method of claim 12 , wherein the scanning pulses are wide beams.

16. The method of claim 12 , wherein the ultrasonic echoes are received by using a multi-beam technology.