Patent ID: 11963819
Assignee: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 4:
5. An ultrasonic flow spectral Doppler imaging system, comprising:
a transmitting circuit that is configured to transmit an ultrasonic beam to an examination object;
a receiving circuit that is configured to receive echoes of the ultrasonic beam to obtain an ultrasonic echo signal;
an image processor that is configured to:
obtain an ultrasonic image of a region of interest in the examination object according to the ultrasonic echo signal,
determine a first sampling position in the region of interest and obtain a first Doppler spectrum corresponding to the first sampling position according to the ultrasonic echo signal,
determine a second sampling position in the region of interest and obtain a second Doppler spectrum corresponding to the second sampling position according to the ultrasonic echo signal,
extract a pulse wave spectrum parameter from the first Doppler spectrum and a same pulse wave spectrum parameter from the second Doppler spectrum, wherein the pulse wave spectrum parameter is selected from the group consisting of End Diastole Velocity (EDV), Resistance Index (RI), ratio of Peak Systole Velocity to End Diastole Velocity (S/D), Pulsatility Index (PI), Acceleration Time (AT), and heart beats per minute, and
subtract the pulse wave spectrum parameter of the first Doppler spectrum from the same pulse wave spectrum parameter of the second Doppler spectrum to calculate a difference thereof; and

an audio player that is configured to output the difference between the pulse wave spectrum parameter of first Doppler spectrum corresponding to the first sampling position and the pulse wave spectrum parameter of second Doppler spectrum corresponding to the second sampling position.