Coronary x-ray angiographic reconstruction and image orientation
| Autor: | Robert A. deKemp, Benjamin J.W. Chow, Glen Lehmann, Kevin Sprague, Maria Drangova, Piotr J. Slomka, David I. W. Levin |
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| Rok vydání: | 2006 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry Computer science Orientation (computer vision) Radiography Epipolar geometry B-spline 3D reconstruction Image processing General Medicine Iterative reconstruction Imaging phantom Coronary arteries medicine.anatomical_structure Positron emission tomography Angiography medicine Medical imaging Computer vision Angiocardiography Artificial intelligence Radiology business Perfusion |
| Zdroj: | Medical Physics. 33:707-718 |
| ISSN: | 0094-2405 |
| Popis: | We have developed an interactive geometric method for 3D reconstruction of the coronary arteries using multiple single-plane angiographic views with arbitrary orientations. Epipolar planes and epipolar lines are employed to trace corresponding vessel segments on these views. These points are utilized to reconstruct 3D vessel centerlines. The accuracy of the reconstruction is assessed using: (1) near-intersection distances of the rays that connect x-ray sources with projected points, (2) distances between traced and projected centerlines. These same two measures enter into a fitness function for a genetic search algorithm (GA) employed to orient the angiographic image planes automatically in 3D avoiding local minima in the search for optimized parameters. Furthermore, the GA utilizes traced vessel shapes (as opposed to isolated anchor points) to assist the optimization process. Differences between two-view and multiview reconstructions are evaluated. Vessel radii are measured and used to render the coronary tree in 3D as a surface. Reconstruction fidelity is demonstrated via (1) virtual phantom, (2) real phantom, and (3) patient data sets, the latter two of which utilize the GA. These simulated and measured angiograms illustrate that the vessel centerlines are reconstructed in 3D with accuracy below 1 mm. The reconstruction method is thus accurate comparedmore » to typical vessel dimensions of 1-3 mm. The methods presented should enable a combined interpretation of the severity of coronary artery stenoses and the hemodynamic impact on myocardial perfusion in patients with coronary artery disease.« less |
| Databáze: | OpenAIRE |
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