|
KMID : 1000620060040010001
|
|
International Journal of Vascular Biomedical Engineering
2006 Volume.4 No. 1 p.1 ~ p.8
|
|
|
X-ray PIV Measurements of Velocity Field of Blood Flows
|
|
Lee Sang-Joon
Kim Guk-Bae
|
|
|
Abstract
|
|
|
|
The x-ray PIV method was improved for measuring quantitative velocity fields of real blood flows using a coherent synchrotron x-ray source. Without using any contrast media or seeding particles, this method can visualize flow pattern of blood by enhancing the phase-contrast and interference characteristics of blood cells based on a synchrotron x-ray imaging mechanism. The enhanced x-ray images were achieved by optimizing the sample-to-scintillator distance, the sample thickness, and hematocrit. The quantitative velocity fields of blood flows inside opaque tubes were obtained by applying a 2-frame PIV algorithm to the x-ray images of the blood flows. The measured velocity field data show typical features of blood flows such as the yield stress effect. The non-Newtonian flow characteristics of blood flows were analyzed using the x-ray PIV method and the experimental results were compared with hemodynamic models.
|
|
|
KEYWORD
|
|
|
x-ray PIV, flow pattern of blood, blood flow, phase-contrast
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|