Ultrasound imaging device and doppler ultrasound imaging method thereof

A Doppler ultrasound imaging method for an ultrasound imaging device, comprising:

• acquiring a current velocity scale;
• controlling an ultrasound probe, based on the current velocity scale, to perform B-mode scanning on a target tissue and C-mode scanning on a region of interest within the target tissue;
• processing echoes of ultrasound waves transmitted during the C-mode scanning to obtain blood flow energy information of a blood vessel in the region of interest, and generating a first C-mode ultrasound image showing the blood flow energy information based on the blood flow energy information of the blood vessel in the region of interest;
• processing echoes of ultrasound waves transmitted during the B-mode scanning to obtain a B-mode ultrasound image of the target tissue;
• generating a first multimodal ultrasound image based on the first C-mode ultrasound image and the B-mode ultrasound image, and displaying the first multimodal ultrasound image in real time;
• increasing the current velocity scale;
• controlling the ultrasound probe, based on the increased velocity scale, to perform B-mode scanning on the target tissue and C-mode scanning on the region of interest within the target tissue, comprising alternately performing scanning by:
• at least one frame of B-mode ultrasound image followed by at least one frame of C-mode ultrasound image, or
• at least one frame of C-mode ultrasound image followed by at least one frame of B-mode ultrasound image;
• wherein non-focused ultrasound waves are transmitted during said C-mode scanning;
• processing echoes of the non-focused ultrasound waves transmitted during said C-mode scanning to obtain blood flow direction information and blood flow velocity magnitude information of the blood vessel in the region of interest, and
• generating a second C-mode ultrasound image showing the blood flow direction information and the blood flow velocity magnitude information, based on the blood flow direction information and the blood flow velocity magnitude information of the blood vessel in the region of interest;
• processing echoes of ultrasound waves transmitted during said B-mode scanning to obtain a B-mode ultrasound image of the target tissue;
• and
• generating a second multimodal ultrasound image based on the second C-mode ultrasound image and said B-mode ultrasound image of the target tissue, and
• displaying the second multimodal ultrasound image in real time.