US 12,465,319 B2
Ultrasonic blood flow imaging method and ultrasonic imaging apparatus
Yigang Du, Shenzhen (CN); and Yongqiang Dong, Shenzhen (CN)
Assigned to Shenzhen Mindray Bio-Medical Electronics Co., Ltd., Shenzhen (CN)
Filed by SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD., Guangdong (CN)
Filed on Mar. 6, 2024, as Appl. No. 18/597,608.
Application 18/597,608 is a continuation of application No. PCT/CN2022/117632, filed on Sep. 7, 2022.
Claims priority of application No. 202111056959.3 (CN), filed on Sep. 9, 2021.
Prior Publication US 2024/0206845 A1, Jun. 27, 2024
Int. Cl. A61B 8/06 (2006.01); A61B 8/00 (2006.01)
CPC A61B 8/06 (2013.01) [A61B 8/463 (2013.01); A61B 8/488 (2013.01); A61B 8/5223 (2013.01); A61B 8/5246 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An ultrasonic blood flow imaging method, comprising:
transmitting first ultrasonic waves, second ultrasonic waves and third ultrasonic waves to a to-be-measured blood flow position of a target object at a first transmitting angle and receiving echoes of the first, second, and third ultrasonic waves so as to acquire first echo signals, second echo signals and third echo signals, with a first pulse repetition frequency between the first ultrasonic waves and the second ultrasonic waves and a second pulse repetition frequency between the second ultrasonic waves and the third ultrasonic waves, and the first pulse repetition frequency being a non-integer multiple of the second pulse repetition frequency;
transmitting fourth ultrasonic waves, fifth ultrasonic waves and sixth ultrasonic waves to the to-be-measured blood flow position at a second transmitting angle different from the first transmitting angle and receiving echoes of the fourth, fifth, and sixth ultrasonic waves so as to acquire fourth echo signals, fifth echo signals and sixth echo signals, with a third pulse repetition frequency between the fourth ultrasonic waves and the fifth ultrasonic waves and a fourth pulse repetition frequency between the fifth ultrasonic waves and the sixth ultrasonic waves, and the third pulse repetition frequency being a non-integer multiple of the fourth pulse repetition frequency;
acquiring a first projection component of a blood flow velocity vector at the to-be-measured blood flow position at the first transmitting angle according to the first echo signals, the second echo signals, the third echo signals, the first pulse repetition frequency and the second pulse repetition frequency;
acquiring a second projection component of the blood flow velocity vector at the to-be-measured blood flow position at the second transmitting angle according to the fourth echo signals, the fifth echo signals, the sixth echo signals, the third pulse repetition frequency and the fourth pulse repetition frequency; and
combining the first projection component and the second projection component to acquire the blood flow velocity vector at the to-be-measured blood flow position.