R
Ramona Lorenz
Researcher at University Medical Center Freiburg
Publications - 14
Citations - 813
Ramona Lorenz is an academic researcher from University Medical Center Freiburg. The author has contributed to research in topics: Imaging phantom & Fontan procedure. The author has an hindex of 9, co-authored 14 publications receiving 718 citations. Previous affiliations of Ramona Lorenz include Northwestern University & University of Freiburg.
Papers
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Journal ArticleDOI
Bicuspid aortic valve is associated with altered wall shear stress in the ascending aorta.
Alex J. Barker,Michael Markl,Jonas Bürk,Ramona Lorenz,Jelena Bock,Simon Bauer,Jeanette Schulz-Menger,Florian von Knobelsdorff-Brenkenhoff +7 more
TL;DR: The results of this study demonstrate that bic Suspid valves induced significantly altered ascending aorta hemodynamics compared with age- and size-matched controls with tricuspid valves.
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In vivo noninvasive 4D pressure difference mapping in the human aorta: phantom comparison and application in healthy volunteers and patients.
Jelena Bock,Alex Frydrychowicz,Ramona Lorenz,Daniel Hirtler,Alex J. Barker,Kevin M. Johnson,Raoul Arnold,Hans Burkhardt,Juergen Hennig,Michael Markl +9 more
TL;DR: The potential of the applied approach to derive additional quantitative information such as pressure gradients from time‐resolved 3D phase contrast MRI demonstrates the potential for noninvasive pressure difference mapping in the human aorta.
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4D flow magnetic resonance imaging in bicuspid aortic valve disease demonstrates altered distribution of aortic blood flow helicity
Ramona Lorenz,Jelena Bock,Alex J. Barker,Alex J. Barker,F. von Knobelsdorff-Brenkenhoff,Wolf Wallis,Jan G. Korvink,Malenka M. Bissell,Jeanette Schulz-Menger,Michael Markl +9 more
TL;DR: In this paper, a 4D flow magnetic resonance imaging was used to test the feasibility of quantitative helicity analysis using equidistantly distributed 2D planes along the entire aorta.
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Influence of eddy current, Maxwell and gradient field corrections on 3D flow visualization of 3D CINE PC‐MRI data
TL;DR: The purpose of this study was to determine the impact of inaccuracies in the measurement of velocities based on phase contrast MRI and to evaluate different correction strategies on three‐dimensional visualization.
Journal ArticleDOI
Experimental investigation of helical structures in swirling flows
TL;DR: In this paper, a generic swirl tube with a tangential double-inlet swirl generator and variable exit orifices was experimentally investigated using magnetic resonance velocimetry (MRV) three-dimensional, three-component velocity fields.