Ola Lysaker

O. M. Lysaker, B. F. Nielsen and S. Wall

Mathematical Modeling of ST-shifts during Ischemia in the Anisotropic Heart

IEEE - Transactions on Biomedical Engineering

O. M. Lysaker, B. F. Nielsen and S. Wall

Bidomain Simulations of Subendocardial Ischemia: the Forward and Inverse Problems

Computing in Cardiology Conference

B. F. Nielsen, O. M. Lysaker and P. Grøttum

Computing Ischemic Regions in the Heart With the Bidomain Model; First Steps Towards Validation

IEEE Transactions on Medical Imaging

O. M. Lysaker, B. F. Nielsen and S. Wall

Computing Ischemic Regions in the Heart: on the Use of Internal Electrodes

Computing in Cardiology Conference (CinC)

G. T. Lines, O. M. Lysaker and B. F. Nielsen

Observability of Ischemia and the Need for Patient Specific Geometrical Models in Inverse ECG

Computing in Cardiology Conference (CinC)

O. M. Lysaker, B. F. Nielsen and S. Wall

Computing Ischemic Regions in the Heart: on the Use of Internal Electrodes

Computing in Cardiology

G. T. Lines, O. M. Lysaker and B. F. Nielsen

Observability of Ischemia and the Need for Patient Specific Geometrical Models in Inverse ECG

Computing in Cardiology, Zaragoza, Spain

O. M. Lysaker, B. F. Nielsen and P. Grøttum

On the Use of the Bidomain Model for Computing the Position and Size of Ischemic Regions; a Validation Study

Computing in Cardiology

B. F. Nielsen, O. M. Lysaker and P. Grøttum

Theoretical and Practical Aspects of the Inverse Ischemia Problem

Presented at Karlsruhe Institute of Technology, Germany

T. S. Ruud, B. F. Nielsen, O. M. Lysaker and J. Sundnes

A Computationally Efficient Method for Determining the Size and Location of Myocardial Ischemia

IEEE Transactions on Biomedical Engineering

O. M. Lysaker, B. F. Nielsen, P. Grøttum, K. Haugaa, J. G. Fjeld and A. Abildgaard

Mathematical Based Imaging of Regional Ischemia

World Congress on Medical Physics and Biomedical Engineering

B. F. Nielsen, O. M. Lysaker, P. Grøttum, K. Mardal, A. Tveito, C. Tarrou, K. Haugaa, A. Abildgaard and J. G. Fjeld

Can ECG Recordings and Mathematics Tell the Condition of Your Heart?

Simula Research Laboratory - by thinking constantly about it

X. Tai, K. Mørken, O. M. Lysaker and K. Lie

Scale Space and Variational Methods in Computer Vision

B. F. Nielsen, O. M. Lysaker, P. Grøttum, A. Tveito, K. Haugaa, A. Abildgaard, J. G. Fjeld and M. Burger

Modelling, Mathematical Properties and Validation of the Inverse Ischemia Problem

Presented at the Bidomain Workshop, Graz, Austria

B. F. Nielsen, O. M. Lysaker, P. Grøttum, K. Haugaa, J. G. Fjeld and A. Abildgaard

The Inverse Ischemia Problem; Mathematical Models and Validation

Presented at the Applied Inverse Problems conference, Vienna, Austria

O. M. Lysaker, B. F. Nielsen, P. Grøttum, A. Abildgaard, J. Fjeld and K. Haugaa

Computer Simulations for Identifying Ischemic Heart Disease; a Validation Study

Presented at the BBG-MedViz seminar at the Department of Mathematics, University of Bergen

B. F. Nielsen, O. M. Lysaker, P. Grøttum, A. Tveito, A. Abildgaard, J. G. Fjeld and K. Haugaa

On the Use of Computer Simulations for Identifying Ischemic Heart Disease; Theoretical and Practical Aspects

Presented at the workshop Mathematics in Medicine/Biology, Centre of Mathematics for Applications, Department of Mathematics, University of Oslo

B. F. Nielsen, O. M. Lysaker, P. Grøttum, A. Tveito, A. Abildgaard, J. G. Fjeld and K. Haugaa

The Inverse Problem of Identifying Ischemic Heart Disease

Presented at the annual meeting of European Cardiac Simulation Group, Bologna, Italy

B. F. Nielsen, O. M. Lysaker, P. Grøttum, A. Tveito, A. Abildgaard, J. G. Fjeld and K. Haugaa

Theoretical and Practical Aspects of the Inverse Problem of Electrocardiography

Presented at Institut für Mathematik und Wissenschaftliches Rechnen, Karl Franzes Universität in Graz, Austria. Also presented at Institut für Numerische und Angewandte Mathematik, Westfälische Wilhelms-Universität Münster, Germany

O. M. Lysaker, B. F. Nielsen, P. Grøttum, A. Abildgaard, J. Fjeld and K. Haugaa

Theoretical and Practical Aspects of the Inverse Problem of Electrocardiography

Presented at the Fourth International Conference Inverse Problems: Modeling and Simulation, Turkey

M. C. MacLachlan, J. Sundnes, O. Skavhaug, O. M. Lysaker, B. F. Nielsen and A. Tveito

A Linear System of Partial Differential Equations Modeling the Resting Potential of a Heart With Regional Ischemia

Mathematical Biosciences

T. Chan, H. Li, O. M. Lysaker and X. Tai

Level Set Method for Positron Emission Tomography

International Journal of Biomedical Imaging

B. F. Nielsen, X. Cai and O. M. Lysaker

On the Possibility for Computing the Transmembrane Potential in the Heart With a One Shot Method; an Inverse Problem

Mathematical Biosciences

B. F. Nielsen, O. M. Lysaker and A. Tveito

On the Use of the Resting Potential and Level Set Methods for Identifying Ischemic Heart Disease; an Inverse Problem

Journal of Computational Physics

B. F. Nielsen, O. M. Lysaker and M. G. Larson

Can Inverse Problems Tell You the Condition of Your Heart?

Zurich Intelligencer; International Congress on Industrial and Applied Mathematics (ICIAM), Springer-Verlag

O. M. Lysaker and B. F. Nielsen

PDE Methods for Identifying Ischemic Heart Disease

Presented at the 6th International Congress on Industrial and Applied Mathematics

J. Lie, O. M. Lysaker and X. Tai

A Binary Level Set Model and Some Applications to Mumford-Shah Image Segmentation

IEEE Transactions on Image Processing

J. Lie, O. M. Lysaker and X. Tai

A Variant of the Level Set Method and Applications to Image Segmentation

Mathematics of Computation

M. C. MacLachlan, B. F. Nielsen, O. M. Lysaker and A. Tveito

Computing the Size and Location of Myocardial Ischemia Using Measurements of ST-Segment Shift

IEEE Transactions on Biomedical Engineering

O. M. Lysaker and X. Tai

Iterative Image Restoration Combining Total Variation Minimization and a Second-Order Functional

International Journal of Computer Vision

O. M. Lysaker and B. F. Nielsen

Towards a Level Set Framework for Infarction Modeling: an Inverse Problem

International Journal of Numerical Analysis and Modeling

O. M. Lysaker, C. Tarrou, A. Abildgaard and B. F. Nielsen

On the Use of Computers to Simulate Cardiac Functions

The 24th International EuroPACS Conference

B. F. Nielsen, O. M. Lysaker, C. Tarrou, J. Sundnes, X. Cai and K. Mardal

On the Use of the Bidomain Equations for Computing the Transmembrane Potential Throughout the Heart Wall: an Inverse Problem

Computers in Cardiology 2006

C. Tarrou, O. M. Lysaker, X. Cai, K. Mardal, C. Tarrou, T. S. Ruud, M. C. MacLachlan and A. Tveito

Identifying Ischemic Heart Disease in Terms of ECG Recordings and an Inverse Problem for the Bidomain Equations; Modeling and Experiments

The Third International Conference "Inverse Problems: Modeling and Simulation"

B. F. Nielsen, O. M. Lysaker, X. Cai, K. Mardal, C. Tarrou, M. C. MacLachlan, J. Sundnes, G. T. Lines and A. Tveito

Computational Issues in Heart Modeling

Presented at the Johann Radon Institute for Computational and Applied Mathematics, Linz, Austria

O. M. Lysaker, C. Tarrou, A. Abildgaard and B. F. Nielsen

On the Use of Computers to Simulate Cardiac Functions

Presented at the 24th International EuroPACS Conference, Trondheim

B. F. Nielsen, O. M. Lysaker, C. Tarrou, J. Sundnes, X. Cai and K. Mardal

On the Use of the Bidomain Equations for Computing the Transmembrane Potential Throughout the Heart Wall: an Inverse Problem

Presented at the Computers in Cardiology conference in Valencia, Spain

J. Lie, O. M. Lysaker and X. Tai

A Piecewise Constant Level Set Framework

International Journal of Numerical Analysis and Modeling

B. F. Nielsen, O. M. Lysaker, C. Tarrou, A. Abildgaard, M. C. MacLachlan and A. Tveito

On the Use of ST-Segment Shifts and Mathematical Models for Identifying Ischemic Heart Disease

Computers in Cardiology 2005, Lyon, France, September 25-28

O. M. Lysaker and B. F. Nielsen

A Level Set Framework for Infarction Modeling; an Inverse Problem.

Invited speaker at the Fifth Winter School in Computational Mathematics, Geilo

O. M. Lysaker, B. F. Nielsen, A. Tveito, G. T. Lines, J. Sundnes and C. Tarrou

Kan Man Simulere Et Hjerteslag?

LAMIS - SOMMERKURS Matematikk - med røtter og vinger, Asker

B. F. Nielsen, O. M. Lysaker, C. Tarrou, M. C. MacLachlan, A. Abildgaard and A. Tveito

Kan Vi Identifisere Hjerteinfarkt Ved Hjelp Av Datamaskiner?

Presented at the BeMatA seminar (Norwegian Research Council), Hurdal

B. F. Nielsen, O. M. Lysaker, M. C. MacLachlan and A. Tveito

On the Use of Level Set Techniques for Identifying Heart Infarctions

Presented at the Level Set Methods for Direct and Inverse Problems workshop in Linz, Austria

B. F. Nielsen, O. M. Lysaker, C. Tarrou, M. C. MacLachlan, A. Abildgaard and A. Tveito

On the Use of ST-Segment Shifts and Mathematical Models for Identifying Ischemic Heart Disease

Presented at the Computers in Cardiology conference in Lyon, France

B. F. Nielsen and O. M. Lysaker

The Classical Inverse ECG Problem

Invited speaker at the Fifth Winter School in Computational Mathematics, Geilo

O. M. Lysaker, S. Osher and X. Tai

Noise Removal Using Smoothed Normals and Surface Fitting

IEEE Transactions on Image Processing

O. M. Lysaker and B. F. Nielsen

A Level Set Framework for Infarction Modeling; an Inverse Problem

Presented at the 2004 SIAM Conference on the Life Sciences, Portland, Oregon, USA

Y. Zhang, C. Bajaj, T. Hughes, W. K. Liu, G. Chen, X. Wang, O. M. Lysaker and C. Tarrou

Finite Element Meshing for Cardiac Analysis

Poster Presentation, 13th International Meshing Roundtable, Williamsburg, Virginia, September19-22

B. F. Nielsen, O. M. Lysaker, G. T. Lines and A. Tveito

Parameter Identification Problems for Infarction Modelling

Presented at the 2004 SIAM Conference on the Life Sciences, Portland, Oregon, USA

O. M. Lysaker, A. Lundervold and X. Tai

Noise Removal Using Fourth-Order Partial Differential Equation With Applications to Medical Magnetic Resonance Images in Space and Time

IEEE Transactions on Image Processing

O. M. Lysaker

Variational PDE Techniques for Image Processing Problems

O. M. Lysaker

Combining Higher and Lower Order PDEs in Image Processing

Presented at the International Conference on Scientific Computing and Partial Differential Equations;On the Occasion of Stanley Osher's 60th birthday, Hong Kong

O. M. Lysaker, A. Lundervold, X. Tai, M. Bock and L. Schad

Noise Removal With Tissue Boundary Preservation Using Fourth-Order Partial Differential Equations

Proc. Intl. Soc. Mag. Reson. Med 9, 2001

O. M. Lysaker

Higher Order PDE for Noise Removal in Medical Images

Poster presentation at the FIRST SIAM-EMS Conference AMCW, Berlin