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Department of Information Technology

Research

I'm a researcher at the division of Systems and Control in Professor Peter Stoica's group. I defended my PhD thesis, titled: Contributions to Signal Processing for MRI on May 8th, 2015.

My main field of research is signal processing, with the application Magnetic Resonance Imaging (MRI). By modeling the MR signal and estimating the model parameters from data, measures of tissue-specific physical properties can be obtained. The optimization problems solved are typically nonlinear, and require intelligent and application-specific algorithms to avoid suboptimal local minima. Designing such algorithms is a challenging research problem.

Publications

  1. NOVIFAST: A Fast Algorithm for Accurate and Precise VFA MRI<em>T</em><sub>1</sub>Mapping. Gabriel Ramos-Llordén, Gonzalo Vegas-Sánchez-Ferrero, Marcus Björk, Floris Vanhevel, Paul M. Parizel, Raúl San José Estépar, Arnold J. den Dekker, and Jan Sijbers. In IEEE Transactions on Medical Imaging, volume 37, number 11, pp 2414-2427, IEEE, 2018. (DOI).
  2. NOVIFAST: A fast non-linear least squares method for accurate and precise estimation of T1 from SPGR signals.. Gabriel Ramos-Llordén, Arnold Jan den Dekker, Marcus Björk, Marleen Verhoye, and Jan Sijbers. In , 2016.
  3. A multicomponent T<sub>2</sub> relaxometry algorithm for myelin water imaging of the brain. Marcus Björk, Dave Zachariah, Joel Kullberg, and Peter Stoica. In Magnetic Resonance in Medicine, volume 75, number 1, pp 390-402, 2016. (DOI).
  4. Contributions to Signal Processing for MRI. Marcus Björk. Ph.D. thesis, Uppsala Dissertations from the Faculty of Science and Technology nr 113, Acta Universitatis Upsaliensis, Uppsala, 2015. (fulltext, preview image).
  5. New approach to phase correction in multi-echo T<sub>2</sub> relaxometry. Marcus Björk and Peter Stoica. In Journal of magnetic resonance, volume 249, pp 100-107, 2014. (DOI).
  6. Magnitude-constrained sequence design with application in MRI. Marcus Björk and Peter Stoica. In Proc. 39th IEEE International Conference on Acoustics, Speech, and Signal Processing, International Conference on Acoustics Speech and Signal Processing, pp 4943-4947, IEEE, Piscataway, NJ, 2014. (DOI).
  7. Parameter estimation approach to banding artifact reduction in balanced steady-state free precession. Marcus Björk, R. Reeve Ingle, Erik Gudmundson, Peter Stoica, Dwight G. Nishimura, and Joëlle K. Barral. In Magnetic Resonance in Medicine, volume 72, number 3, pp 880-892, 2014. (DOI).
  8. Fast denoising techniques for transverse relaxation time estimation in MRI. Marcus Björk and Peter Stoica. In Proc. 21st European Signal Processing Conference, 2013. (PDF).
  9. SNR Requirements for T1 and T2 Estimation using bSSFP. R. Reeve Ingle, Joëlle K. Barral, Marcus Björk, Erik Gudmundson, Peter Stoica, and Dwight G. Nishimura. In Proceedings of the ISMRM 20th annual meeting, 2012.
  10. Optimality of Equally-Spaced Phase Increments for Banding Removal in bSSFP. Marcus Björk, R. Reeve Ingle, Joëlle K. Barral, Erik Gudmundson, Dwight G. Nishimura, and Peter Stoica. In Proceedings of the ISMRM 20th annual meeting, 2012.
  11. Signal Modeling and the Cramér-Rao Bound for Absolute Magnetic Resonance Thermometry in Fat Tissue. Marcus Björk, Johan Berglund, Joel Kullberg, and Peter Stoica. In Proc. 45th Asilomar Conference on Signals, Systems, and Computers, pp 80-84, 2011. (DOI).
  12. Signal Processing Algorithms for Removing Banding Artifacts in MRI. Marcus Björk, Erik Gudmundson, Joëlle Barral, and Peter Stoica. In Proceedings of the 19th European Signal Processing Conference (EUSIPCO-2011), European Signals Processing Conference, pp 1000-1004, 2011. (fulltext:print).
  13. Dynamic models with quantized output for modeling patient response to pharmacotherapy. Marcus Björk, Alexander Medvedev, and Peter Stoica. In Proc. International Conference on Control Applications: CCA 2010, pp 1029-1034, IEEE, Piscataway, NJ, 2010. (DOI).
  14. Estimation of dynamic models with output quantization applied to drug response modeling. Marcus Björk and Alexander Medvedev. Reglermöte 2010, Lund, 2010.

Teaching

VT16

HT15

HT14

HT13

HT12

2011

2010

  • Period 2, responsible for IT, STS, X and W:s projects in the two courses in Transformmetoder given by Lennart Salling (for IT, W and X) and Anders Södergren (for STS), at the Math department.
  • Period 1, lab assistant in Reglerteknik II (F4, STS4, W4) given by Torsten Söderström at the IT department.
Updated  2016-04-08 18:20:47 by Marcus Björk.