Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3285173
Keywords
blood flow measurement; cardiovascular system; computerised tomography; image reconstruction; least squares approximations; synchrotrons; velocity measurement
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Funding
- Japan Synchrotron Radiation Research Institute (JASRI) [2008B1969]
- Australian Research Council [DP0877327]
- Australian Research Council [DP0877327] Funding Source: Australian Research Council
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An x-ray velocimetry technique is described which provides three components of velocity measurement in three dimensional space. Current x-ray velocimetry techniques, which use particle images taken at a single projection angle, are limited to two components of velocity measurement, and are unable to measure in three dimensions without a priori knowledge of the flow field. The proposed method uses multiple projection angles to overcome these limitations. The technique uses a least-squares iterative scheme to tomographically reconstruct the three-dimensional velocity field directly from two-dimensional image pair cross-correlations, without the need to reconstruct three-dimensional particle images. Synchrotron experiments demonstrate the effectiveness of the technique for blood flow measurement in opaque vessels, with applications for the diagnosis and treatment of cardiovascular disease.
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