Browsing by Author "Valverde, Israel"
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- Item3D printed cardiovascular models for surgical planning in complex congenital heart diseases(2015) Valverde, Israel; Gomez, Gorka; Suarez-Mejias, Cristina; Hosseinpour, Amir-Reza; Hazekamp, Mark; Roest, Arno; Vazquez-Jimenez, Jaime F; El-Rassi, Issam; Uribe Arancibia, Sergio A.; Gomez-Cia, Tomas
- Item3D Printed Models for Planning Endovascular Stenting in Transverse Aortic Arch Hypoplasia(2015) Valverde, Israel; Gómez, Gorka; Coserria, Jose Felix; Suarez Mejias, Cristina; Uribe Arancibia, Sergio A.; Sotelo Parraguez, Julio Andrés; Velasco, Maria Nieves; De Soto, Jose Santos; Hosseinpour, Amir Reza; Gómez Cia, Tomas
- Item3D Quantification of Wall Shear Stress and Oscillatory Shear Index Using a Finite-Element Method in 3D CINE PC-MRI Data of the Thoracic Aorta(2016) Sotelo Parraguez, Julio Andrés; Urbina, Jesus; Valverde, Israel; Tejos Nunez, Cristian Andres; Irarrázaval Mena, Pablo; Andia Kohnenkampf, Marcelo Edgardo; Uribe Arancibia, Sergio A.; Hurtado Sepúlveda, DanielSeveral 2D methods have been proposed to estimate WSS and OSI from PC-MRI, neglecting the longitudinal velocity gradients that typically arise in cardiovascular flow, particularly on vessel geometries whose cross section and centerline orientation strongly vary in the axial direction. Thus, the contribution of longitudinal velocity gradients remains understudied. In this work, we propose a 3D finite-element method for the quantification of WSS and OSI from 3D-CINE PC-MRI that accounts for both in-plane and longitudinal velocity gradients. We demonstrate the convergence and robustness of the method on cylindrical geometries using a synthetic phantom based on the Poiseuille flow equation. We also show that, in the presence of noise, the method is both stable and accurate. Using computational fluid dynamics simulations, we show that the proposed 3D method results in more accurate WSS estimates than those obtained from a 2D analysis not considering out-of-plane velocity gradients. Further, we conclude that for irregular geometries the accurate prediction of WSS requires the consideration of longitudinal gradients in the velocity field. Additionally, we compute 3D maps of WSS and OSI for 3D-CINE PC-MRI data sets from an aortic phantom and sixteen healthy volunteers and two patients. The OSI values show a greater dispersion than WSS, which is strongly dependent on the PC-MRI resolution. We envision that the proposed 3D method will improve the estimation of WSS and OSI from 3D-CINE PC-MRI images, allowing for more accurate estimates in vessels with pathologies that induce high longitudinal velocity gradients, such as coarctations and aneurisms.
- ItemA realistic MR compatible aortic phantom to validate hemodynamic parameters from MRI data: aortic coarctation patients comparison using catheterization(2015) Urbina, Jesus; Sotelo Parraguez, Julio Andrés; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Andía Kohnenkampf, Marcelo Edgardo; Razavi, Reza; Valverde, Israel; Uribe Arancibia, Sergio A.
- ItemCaval Blood Flow Distribution in Patients with Fontan Circulation : Quantification by Using Particle Traces from 4D Flow MR Imaging(2013) Bächler, Pablo; Valverde, Israel; Pinochet, Natalia; Nordmeyer, Sarah; Kuehne, Titus; Crelier, Gérard; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Beerbaum, P.; Uribe Arancibia, Sergio A.
- ItemCongenital Heart Disease in Children: Coronary MR Angiography during Systole and Diastole with Dual Cardiac Phase Whole-Heart Imaging(RADIOLOGICAL SOC NORTH AMERICA, 2011) Uribe, Sergio; Hussain, Tarique; Valverde, Israel; Tejos, Cristian; Irarrazaval, Pablo; Fava, Mario; Beerbaum, Philipp; Botnar, Rene M.; Razavi, Reza; Schaeffter, Tobias; Greil, Gerald F.Purpose: To assess the optimal timing for coronary magnetic resonance (MR) angiography in children with congenital heart disease by using dual cardiac phase whole-heart MR imaging.
- ItemFlow-sensitive four-dimensional magnetic resonance imaging facilitates the quantitative analysis of systemic-to-pulmonary collateral flow in patients with univentricular hearts(2012) Uribe Arancibia, Sergio A.; Nordmeyer, Sarah; Valverde, Israel; Greil, Gerald F.; Berger, Felix; Kuehne, Titus; Beerbaum, Philipp B.
- ItemHemodynamic Assessment in Patients with One-and-a-Half Ventricle Repair Revealed by Four-Dimensional Flow Magnetic Resonance Imaging(2013) Uribe Arancibia, Sergio A.; Bächler, Pablo; Valverde, Israel; Crelier, Gérard R.; Beerbaum, Philipp; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo
- ItemImproving congenital heart disease imaging using 3d whole-heart dual-phase MRI(2011) Hussain, Tarique; Uribe Arancibia, Sergio A.; Lossnitzer, Dirk; Bellsham-Revell, Hannah; Valverde, Israel; Razavi, Reza; Beerbaum, Phillip; Bell, Aaron; Botnar, René Michael; Schaeffter, Tobias
- ItemQuantification of pulmonary regurgitation in patients with repaired Tetralogy of Fallot by 2D phase-contrast MRI: Differences between the standard method of velocity averaging and a pixel-wise analysis(2017) Sotelo Parraguez, Julio Andrés; Bächler, Pablo; Urbina, Jesús; Crelier, Gerard; Toro Rosas, Lida Elba Graciela; Ferreiro, Myriam; Valverde, Israel; Andía Kohnenkampf, Marcelo Edgardo; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Uribe Arancibia, Sergio A.
- ItemQuantification of wall shear stress using a finite-element method in multidimensional phase-contrast MR data of the thoracic aorta(2015) Sotelo Parraguez, Julio Andrés; Urbina, Jesús; Valverde, Israel; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Hurtado Sepúlveda, Daniel; Uribe Arancibia, Sergio A.
- ItemRealistic aortic phantom to study hemodynamics using MRI and cardiac catheterization in normal and aortic coarctation conditions(2016) Urbina, Jesús; Sotelo Parraguez, Julio Andrés; Springmüller P., Daniel; Montalba, Cristian; Letelier, Karis; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Andía Kohnenkampf, Marcelo Edgardo; Razavi, Reza; Valverde, Israel; Uribe Arancibia, Sergio A.
- ItemThree-dimensional patient-specific cardiac model for surgical planning in Nikaidoh procedure(2015) Valverde, Israel; Gómez, Gorka; González, Antonio; Suárez Mejías, Cristina; Adsuar, Alejandro; Coserria, José Félix; Uribe Arancibia, Sergio A.; Gómez-Cia, Tomás; Hosseinpour, Amir Reza
- ItemThree-dimensional printed models for surgical planning of complex congenital heart defects: an international multicentre study(2017) Valverde, Israel; Gómez Ciriza, Gorka; Hussain, Tarique; Suárez Mejías, Cristina; Velasco Forte, María N.; Byrne, Nicholas; Ordoñez, Antonio; González Calle, Antonio; Anderson, David; Uribe Arancibia, Sergio A.
- ItemThree-dimensional quantification of vorticity and helicity from 3D cine PC-MRI using finite-element interpolations(2018) Sotelo Parraguez, Julio Andrés; Urbina, Jesús; Valverde, Israel; Mura Mardones, Joaquín Alejandro; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Andía Kohnenkampf, Marcelo Edgardo; Hurtado Sepúlveda, Daniel; Uribe Arancibia, Sergio A.
- ItemVariability of 4D flow parameters when subjected to changes in MRI acquisition parameters using a realistic thoracic aortic phantom(2018) Montalba, Cristian; Urbina, Jesus; Sotelo Parraguez, Julio Andrés; Andía Kohnenkampf, Marcelo Edgardo; Tejos Núñez, Cristián Andrés; Irarrázaval Mena, Pablo; Hurtado Sepúlveda, Daniel; Valverde, Israel; Uribe Arancibia, Sergio A.