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- Marcus Bjork, Erik Gudmundson, Joelle K. Barral, Petre Stoica
- 2011 19th European Signal Processing Conference
- 2011

In magnetic resonance imaging (MRI), the balanced steady-state free precession (bSSFP) pulse sequence has shown to be of great interest, due to its relatively high signal-to-noise ratio in a short scan time. However, images acquired with this pulse sequence suffer from banding artifacts due to off-resonance effects. These artifacts typically appear as black… (More)

- Marcus Bjork
- 2015

Björk, M. 2015. Contributions to Signal Processing for MRI. Uppsala Dissertations from the Faculty of Science and Technology 113. xviii+176 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9204-5. Magnetic Resonance Imaging (MRI) is an important diagnostic tool for imaging soft tissue without the use of ionizing radiation. Moreover, through… (More)

- Marcus Bjork, Johan Berglund, Joel Kullberg, Petre Stoica
- ACSCC
- 2011

Magnetic Resonance Imaging of tissues with both fat and water resonances allows for absolute temperature mapping through parametric modeling. The fat resonance is used as a reference to determine the absolute water resonance frequency which is linearly related to the temperature. The goal of this paper is to assess whether or not resonance frequency based… (More)

- Marcus Bjork, Petre Stoica
- 2014 IEEE International Conference on Acoustics…
- 2014

In this paper we present an algorithm for sequence design with magnitude constraints. We formulate the design problem in a general setting, but also illustrate its relevance to parallel excitation MRI. The formulated non-convex design optimization criterion is minimized locally by means of a cyclic algorithm, consisting of two simple algebraic sub-steps.… (More)

- Marcus Bjork, Petre Stoica
- 21st European Signal Processing Conference…
- 2013

Estimating the transverse relaxation time (T<sub>2</sub>) from magnitude spin echo images is a common problem in Magnetic Resonance Imaging. The standard approach is to use pixelwise estimates; however these estimates can be quite noisy when only two images are available. By imposing inter-pixel information the estimates can be improved. An optimal… (More)

- Marcus Bjork, Alexander Medvedev, Petre Stoica
- 2010 IEEE International Conference on Control…
- 2010

This article presents a way of modeling patient response to a pharmacotherapy by means of dynamic models with quantized output. The proposed modeling technique is exemplified by treatment of Parkinson's disease with Duodopa <sup>®</sup>, where the drug is continuously administered via duodenal infusion. Titration of Duodopa <sup>®</sup> is… (More)

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