Biomedical Imaging GroupSTI
English only   BIG > Publications > Flow Fields

 Home Page
 News & Events
 Tutorials and Reviews
 Download Algorithms

 All BibTeX References

Variational Enhancement and Denoising of Flow Field Images

P.D. Tafti, R. Delgado-Gonzalo, A.F. Stalder, M. Unser

Best student paper award, Proceedings of the Eighth IEEE International Symposium on Biomedical Imaging: From Nano to Macro (ISBI'11), Chicago IL, USA, March 30-April 2, 2011, pp. 1061-1064.

In this work we propose a variational reconstruction algorithm for enhancement and denoising of flow fields that is reminiscent of total-variation (TV) regularization used in image processing, but which also takes into account physical properties of flow such as curl and divergence. We point out the invariance properties of the scheme with respect to transformations of the coordinate system such as shifts, rotations, and changes of scale. To demonstrate the utility of the reconstruction method, we use it first to denoise a simulated phantom where the scheme is found to be superior to its quadratic (L2) variant both in terms of SNR and in preservation of discontinuities. We then use the scheme to enhance the quality of pathline visualizations in an application to 4D (3D+time) flow-sensitive magnetic resonance imaging of blood flow in the aorta.

AUTHOR="Tafti, P.D. and Delgado-Gonzalo, R. and Stalder, A.F. and Unser,
TITLE="Variational Enhancement and Denoising of Flow Field Images",
BOOKTITLE="Proceedings of the Eighth {IEEE} International Symposium on
        Biomedical Imaging: {F}rom Nano to Macro ({ISBI'11})",
address="Chicago IL, USA",
month="March 30-April 2,",
note="Best student paper award")

© 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from IEEE.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.