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Partical image velocimetry suitable for X-ray projection imaging
专利权人:
Andreas Fouras
发明人:
Andreas Fouras,Stephen Dubsky
申请号:
US13588291
公开号:
US09025849B2
申请日:
2012.08.17
申请国别(地区):
US
年份:
2015
代理人:
摘要:
A 2D or 3D velocity field is reconstructed from a cross-correlation analysis of image pairs of a sample, without first reconstructing images of the sample spatial structure. The method can be implemented via computer tomographic x-ray particle image velocimetry, using multiple projection angles, with phase contrast images forming dynamic speckle patterns. Estimated cross-correlations may be generated via convolution of a measured autocorrelation function with a velocity probability density function, and the velocity coefficients iteratively optimized to minimize the error between the estimated cross-correlations and the measured cross-correlations. The method may be applied to measure blood flow, and the motion of tissue and organs such as heart and lungs.
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