MR-image reconstruction/enhancement
Gibbs Ringing Removal
Gibbs-ringing is a well known artifact which manifests itself as spurious oscillations in the vicinity of sharp image transients, e.g. at tissue boundaries. In this project we invetsigate a simple and robust method which exploits a different view on the Gibbsphenomena. The truncation in k-space can be interpreted as a convolution with a sinc-function in image space. Hence, the severity of the artifacts depends on how the sinc-function is sampled. We propose to reinterpolate the image based on local, subvoxel shifts to sample the ringing pattern at the zero-crossings of the oscillating sinc-function.
- E. Kellner and B. Dhital and V. Kiselev and M. Reisert
“Gibbs-ringing artifact removal based on local subvoxel-shifts”
Magnetic resonance in medicine, 2015, Wiley Online Library
MR-image reconstruction
In general we are interested MR-image recsontruction and trajectory design and have several ongoing collaborations in this field
- M. Meissner, M. Reisert, T. Hugger, J. Hennig, D. von Elverfeldt and J. Leupold
“Revealing signal from noisy 19F MR images by chemical shift artifact correction”
Magnetic Resonance in Medicine, 2014, Wiley Online Library - G. Schultz, D. Gallichan, M. Reisert, J. Hennig, and M. Zaitsev
“MR image reconstruction from generalized projections”
Magnetic Resonance in Medicine, 2013, Wiley Online Library - Jakob Assländer, Benjamin Zahneisen, Thimo Hugger, Marco Reisert, Hsu-Lei Lee, Pierre LeVan and Jürgen Hennig
“Single shot whole brain imaging using spherical stack of spirals trajectories”
Neuroimage, Volume 73, June 2013, Pages 59–70 - Benjamin Zahneisen, Thimo Hugger, Kuan J. Lee, Pierre LeVan, Marco Reisert, Hsu-Lei Lee, Jakob Assländer, Maxim Zaitsev, Jürgen Hennig
“Single shot concentric shells trajectories for ultra fast fMRI”
Magnetic Resonance in Medicine, Nov 2011, Epub, DOI: 10.1002/mrm.23256
Dr. Marco Reisert
Group Leader
Tel.: +49 761 270-93860
E-Mail: marco.reisert@uniklinik-freiburg.de
University Medical Center Freiburg
Dept. of Radiology · Medical Physics
Killianstr. 5a
79106 Freiburg