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Ramona Lorenz

Contact: Ramona Lorenz Department of Radiology Medical Physics University Medical Center Freiburg Breisacher Str. 60a 79106 Freiburg room: 00-015a phone: +49 761 270 73930 fax: +49 761 270 73920 e-mail: ramona.lorenz'at'uniklinik-freiburg.de

• Blood flow analysis and characterization such as helical flow in volunteers and patients
• Realistic in-vitro vessel model of the aorta with flexible stenosis in the DAo
• Realistic in-vitro vessel model of the aorta with flexible vessel walls
• Pulsatile flow circuit using a ventricular assistant device (VAD) and a pump system
• Improvement of the VAD-pump system

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Projects

• Flow sensitive MRI in realistic model systems of the thoracic aorta with different stenosis grades. 

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Publications

Journal Paper (as first author)

• R. Lorenz, C. Benk, J. Bock, A.F. Stalder, J.G. Korvink, J. Hennig and M. Markl:
  Closed Circuit MR Compatible Pulsatile Pump System Using a Ventricular Assist Device and Pressure Control Unit
  MRM 2012, 67(1):258-68

• R. Lorenz, J. Hennig, M. E. Bellemann, K. A. Il’yasov:
  Anisotropic Phantoms for Quantitative Diffusion Tensor Imaging and Fiber-Tracking Validation
  AMR 2008, 33(4):419-429

Conference Abstracts (as first author)

• R. Lorenz, J. Bock, A. Barker, F. Knobelsdorff-Brenkenhoff, J.G. Korvink, M. Markl:
  4D Flow MRI in aortic valve disease demonstrates altered distribution of aortic blood flow helicity. #709
  Proceedings 20th Scientific Meeting ISMRM, Melbourne, Australia, 2012

• R. Lorenz, J. Bock, A. Barker, F. Knobelsdorff-Brenkenhoff, J.G. Korvink, M. Markl:
  Distribution of blood flow helicity in the healthy aorta and in patients with aortic valve disease.
  23nd Annual International Conference on Magnetic Resonance Angiography, Banff, Alberta Canada, 2011

• R. Lorenz, J. Bock, J.G. Korvink, M. Markl:
  Normal distribution on blood flow helicity in the healthy aorta. #3412
  Proceedings 19th Scientific Meeting ISMRM, Montreal, Québec Canada, 2011

• R. Lorenz, J. Bock, J. Korvink, M. Markl:
  Correction methods for streamline visualization in the aorta and the superior sagittal sinus of healthy volunteers.
  22nd Annual International Conference on Magnetic Resonance Angiography, Seoul, South Korea, 2010

• R. Lorenz, J. Bock, J. Korvink, M. Markl:
  Importance of different correction methods for optimized 3D visualization of 3-directional MR velocity data. #754
  Proceedings 18th Scientific Meeting ISMRM, Stockholm, Sweden, 2010

• R. Lorenz, C. Benk, J. Bock, J. Korvink, M. Markl:
  Improved simulation of 3D flow characteristics in a pressure controlled in vitro model system. #3711
  Proceedings 18th Scientific Meeting ISMRM, Stockholm, Sweden, 2010

• R. Lorenz, J. Bock, A. F. Stalder, C. Benk, J. Hennig, M. Markl:
  3D flow characteristics in a patient specific aortic aneurysm vessel model: comparison with in-vivo results. #3855
  Proceedings 17th Scientific Meeting ISMRM, Honolulu, USA, 2009

• R. Lorenz, J. Bock, A. F. Stalder, J. Korvink, J. Hennig, M. Markl:
  4D flow sensitive MRI in realistic aortic in-vitro models using a novel MR compatible pulsatile pump system with ventricular assist device.
  Flow and Motion Workshop, Sintra, Portugal, 2009

• R. Lorenz, A. F. Stalder, J. Bock, D. Klausmann, C. Benk, J. Henning, M. Markl:
  Flow Sensitive MRI in a Realistic Model System of the Thoracic Aorta
  with Aortic Coarctation. #2825
  Proceedings 16th Scientific Meeting ISMRM, Toronto, Canada, 2008

• R. Lorenz, J. Bock, A. F. Stalder, M. Markl:
  Novel closed circuit MR compatible pulsatile pump system using a ventricular assist device. #802
  Proceedings 25th Annual Meeting ESMRMB, Valencia, Spain, 2008

• R. Lorenz, B. W. Kreher, J. Hennig, M. E. Bellemann, K. A. Il’yasov:
  Anisotropic Fiber Phantom for DTI validation on a clinical scanner. #2738
  Proceedings 14th Scientific Meeting ISMRM, Seattle, USA, 2006

• R. Lorenz, M. E. Bellemann, J. Hennig, K. A. Il'yasov:
  Entwicklung eines anisotropen Diffusionsphantoms für quantitative
  Diffusionstensor-Bildgebung und Validierung von Fibertracking-Algorithmen.
  Proceedings Annual Meeting German Chapter of ISMRM, Jena, 2006

Master Thesis

• R. Lorenz
  Flow sensitive MRI in realistic model systems of the thoracic aorta.
  Dept. of Diagnostic Radiology, Medical Physics,University Hospital Freiburg, 2007

Diploma Thesis

• R. Lorenz
  Entwicklung eines ansitropen Diffusionsphantoms für quantitative Diffusionstensor-Bildgebung und Validierung von Fibertracking.
  Dept. of Diagnostic Radiology, Medical Physics,University Hospital Freiburg, 2006

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CV

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