title: [Two-dimensional measurement of blood flow velocity in rat arteries based on ultrasonic particle image velocimetry].
abstract: OBJECTIVE
  Ultrasonic pulse wave Doppler technique for noninvasive blood flow imaging does not provide precise information of complex blood flow field, and observing two-dimensional artery blood flow field distribution provides important clinical information for cardiovascular disease.
  
  
  METHODS
  Ultrasonic particle image velocimetry (Echo PIV) was used to measure blood flows on B-mode ultrasonic particle image to assess the whole field velocity of the blood vessels in 5 groups of healthy rats. The reliability of Echo PIV was verified in comparison with ultrasonic Doppler method in 3 cardiac cycles.
  
  
  CONCLUSIONS
  The results of Echo PIV were similar with the those of ultrasound spectral Doppler. The Echo PIV-measured peak and average velocity within 3 cardiac cycles were about 5%-10% and 2%-8% below the values measured by the ultrasonic spectral Doppler, respectively, but these differences were not statistically significant (P>0.05). As a new technique for monitoring complex blood flow in stenotic arteries, echo PIV can be used to directly and non-invasively assess whole field hemodynamic changes in blood vessels in real time and distinguish different groups of rats by velocity.
authors.affiliation: School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China. E-mail: 70316782@qq.com.
authors.forename: Yiheng
authors.initials: Y
authors.lastname: Zhu
authors.forename: Ming
authors.initials: M
authors.lastname: Qian
authors.forename: Lili
authors.initials: L
authors.lastname: Niu
authors.forename: Hairong
authors.initials: H
authors.lastname: Zheng
authors.forename: Guangwen
authors.initials: G
authors.lastname: Lu
mesh_terms: D000818:Animals; D001158:Arteries / Q000000981:diagnostic imaging*; D001783:Blood Flow Velocity; D006439:Hemodynamics; D051381:Rats; D015203:Reproducibility of Results; D012212:Rheology; D014465:Ultrasonics; D014463:Ultrasonography