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Enhancement of measurement accuracy of X-ray PIV in comparison with the micro-PIV technique SCIE SCOPUS

Title
Enhancement of measurement accuracy of X-ray PIV in comparison with the micro-PIV technique
Authors
Park, HanwookJung, Sung YongPark, Jun HongKim, Jun HoLee, Sang Joon
Date Issued
2018-03
Publisher
INT UNION CRYSTALLOGRAPHY
Abstract
The X-ray PIV (particle image velocimetry) technique has been used as a non-invasive measurement modality to investigate the haemodynamic features of blood flow. However, the extraction of two-dimensional velocity field data from the three-dimensional volumetric information contained in X-ray images is technically unclear. In this study, a new two-dimensional velocity field extraction technique is proposed to overcome technological limitations. To resolve the problem of finding a correction coefficient, the velocity field information obtained by X-ray PIV and micro-PIV techniques for disturbed flow in a concentric stenosis with 50% severity was quantitatively compared. Micro-PIV experiments were conducted for single-plane and summation images, which provide similar positional information of particles as X-ray images. The correction coefficient was obtained by establishing the relationship between velocity data obtained from summation images (VS) and centre-plane images (VC). The velocity differences between VS and VC along the vertical and horizontal directions were quantitatively analysed as a function of the geometric angle of the test model for applying the present two-dimensional velocity field extraction technique to a conduit of arbitrary geometry. Finally, the two-dimensional velocity field information at arbitrary positions could be successfully extracted from X-ray images by using the correction coefficient and several velocity parameters derived from VS.
URI
https://oasis.postech.ac.kr/handle/2014.oak/96053
DOI
10.1107/S1600577517017398
ISSN
1600-5775
Article Type
Article
Citation
JOURNAL OF SYNCHROTRON RADIATION, vol. 25, no. 2, page. 552 - 559, 2018-03
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이상준LEE, SANG JOON
Dept of Mechanical Enginrg
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