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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/9D137A6B-2FE0-4192-BB08-6D35CEE8E58B | - |
| Identifier | https://doi.org/10.1109/IEMBS.2004.1403356 | - |
| Identifier | https://ieeexplore.ieee.org/document/1403356 | - |
| Language | en | - |
| Extent | 4 pages | en |
| Title | An inverse problem for reduced-encoding MRI velocimetry in potential flow | en |
| Creator | Rovas Dimitrios | en |
| Creator | Ροβας Δημητριος | el |
| Creator | Raguin L. Guy | en |
| Creator | Georgiadis, John, 1938- | en |
| Creator | Kodali Anil | en |
| Publisher | Institute of Electrical and Electronics Engineers | en |
| Content Summary | We propose a computational technique to reconstruct internal physiological flows described by sparse point-wise MRI velocity measurements. Assuming that the viscous forces in the flow are negligible, the incompressible flow field can be obtained from a velocity potential that satisfies Laplace's equation. A set of basis functions each satisfying Laplace's equation with appropriately defined boundary data is constructed using the finite-element method. An inverse problem is formulated where higher resolution boundary and internal velocity data are extracted from the point-wise MRI velocity measurements using a least-squares method. From the results we obtained with ∼100 internal measurement points, the proposed reconstruction method is shown to be effective in filtering out the experimental noise at levels as high as 30%, while matching the reference solution within 2%. This allows the reconstruction of a high-resolution velocity field with limited MRI encoding. | en |
| Type of Item | Πλήρης Δημοσίευση σε Συνέδριο | el |
| Type of Item | Conference Full Paper | en |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2015-10-17 | - |
| Date of Publication | 2004 | - |
| Subject | Inverse problems | en |
| Subject | MRI | en |
| Subject | Magnetic resonance imaging | en |
| Subject | Velocity measurement | en |
| Subject | Laplace equations | en |
| Subject | Finite element methods | en |
| Subject | Data mining | en |
| Subject | Noise measurement | en |
| Subject | Reconstruction algorithms | en |
| Subject | Matched filters | en |
| Subject | Filtering | en |
| Bibliographic Citation | L. G. Raguin, A. K. Kodali, D. V. Rovas, J. G. Georgiadis, "An inverse problem for reduced-encoding MRI velocimetry in potential flow," in 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, pp.1100-1103, 2004. doi: 10.1109/IEMBS.2004.1403356 | en |
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