Zhang, ChongVilla-Uriol, Maria-CruzCraene, Mathieu dePozo Soler, José Ma. (José María)Frangi Caregnato, AlejandroUniversitat Pompeu Fabra2012-12-192012-12-192009Zhang C, Villa-Uriol MC, De Craene M, Pozo JM, Frangi AF. Morphodynamic analysis of cerebral aneurysm pulsation from time-resolved rotational angiography. IEEE Trans Med Imaging. 2009; 28(7): 1105-1116. DOI 10.1109/TMI.2009.20124050278-0062http://hdl.handle.net/10230/20023This paper presents a technique to estimate and model patient-specific pulsatility of cerebral aneurysms over one/ncardiac cycle, using 3D rotational X-ray angiography (3DRA) acquisitions. Aneurysm pulsation is modeled as a time varying/n-spline tensor field representing the deformation applied to a reference volume image, thus producing the instantaneous/nmorphology at each time point in the cardiac cycle. The estimated deformation is obtained by matching multiple simulated projections of the deforming volume to their corresponding original projections. A weighting scheme is introduced to account for the relevance of each original projection for the selected time point. The wide coverage of the projections, together with the weighting scheme, ensures motion consistency in all directions. The technique has been tested on digital and physical phantoms that are realistic and clinically relevant in terms of geometry, pulsation and imaging conditions. Results from digital phantom/nexperiments demonstrate that the proposed technique is able to recover subvoxel pulsation with an error lower than 10% of the maximum pulsation in most cases. The experiments with the physical phantom allowed demonstrating the feasibility of pulsation estimation as well as identifying different pulsation regions under clinical conditions.12 p.application/pdfeng© 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final published article can be found at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4752727AngiografiaAneurismes cerebralsImatges mèdiquesinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TMI.2009.2012405Image registrationMotion analysisThree-dimensional rotational angiographyX-ray imaginginfo:eu-repo/semantics/openAccess