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5 years ago Publi Francesca: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0190650
PLOSONE (not on HAL) 3D reconstruction of coronary arteries from 2D angiographic projections using non-uniform rational basis splines (NURBS) for accurate modelling of coronary stenoses Francesca Galassi, Mohammad Alkhalil , Regent Lee , Philip Martindale, Rajesh K. Kharbanda, Keith M. Channon , Vicente Grau , Robin P. Choudhury
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0190650
Abstract :
Assessment of coronary stenosis severity is crucial in clinical practice. This study proposes a novel method to generate 3D models of stenotic coronary arteries, directly from 2D coro- nary images, and suitable for immediate assessment of the stenosis severity. From multiple 2D X-ray coronary arteriogram projections, 2D vessels were extracted. A 3D centreline was reconstructed as intersection of surfaces from corresponding branches. Next, 3D luminal contours were generated in a two-step process: first, a Non-Uniform Ratio- nal B-Spline (NURBS) circular contour was designed and, second, its control points were adjusted to interpolate computed 3D boundary points. Finally, a 3D surface was generated as an interpolation across the control points of the contours and used in the analysis of the severity of a lesion. To evaluate the method, we compared 3D reconstructed lesions with Optical Coherence Tomography (OCT), an invasive imaging modality that enables high-res- olution endoluminal visualization of lesion anatomy. Validation was performed on routine clinical data. Analysis of paired cross-sectional area discrepancies indicated that the proposed method more closely represented OCT contours than conventional approaches in luminal surface reconstruction, with overall root-mean- square errors ranging from 0.213mm 2 to 1.013mm 2 , and maximum error of 1.837mm 2 . Comparison of volume reduction due to a lesion with corresponding FFR measurement sug- gests that the method may help in estimating the physiological significance of a lesion.
Publi Claire? "Statistical Shape Analysis of Large Datasets Based on Diffeomorphic Iterative Centroids"