Dr.-Ing. Matthias Gräser

Universitätsklinikum Hamburg-Eppendorf (UKE)
Sektion für Biomedizinische Bildgebung
Lottestraße 55
2ter Stock, Raum 212
22529 Hamburg

Technische Universität Hamburg (TUHH)
Institut für Biomedizinische Bildgebung
Gebäude E, Raum 4.044
Am Schwarzenberg-Campus 3
21073 Hamburg

Tel.: 040 / 7410 25812
E-Mail: matthias.graeser(at)tuhh.de
E-Mail: ma.graeser(at)uke.de

Research Interests

  • Magnetic Particle Imaging
  • Low Noise Electronics
  • Inductive Sensors
  • Passive Electrical Devices

Curriculum Vitae

Matthias Gräser submitted his Dr.-Ing. thesis in january 2016 at the institute of medical engineering (IMT) at the university of Lübeck and is now working as a Research Scientist at the institute for biomedical imaging (IBI) at the technical university in Hamburg, Germany.  Here he develops concepts for Magnetic-Particle-Imaging (MPI) devices. His main aim is to improve the sensitivity of the imageing devices and improve resolution and application possibilities of MPI technology.

In 2011 Matthias Gräser started to work at the IMT as a Research Associate in the Magnetic Particle Imaging Technology (MAPIT) project. In this project he devolped the analog signal chains for a rabbit sized field free line imager. Additionally he developed a two-dimensional Magnetic-Particle-Spectrometer. This device can apply various field sequences and measure the particle response with a very high signal-to-noise ratio (SNR).

The dynamic behaviour of magnetic nanoparticles is still not fully understood. Matthias Gräser investigated the particle behaviour by modeling the particle behaviour with stochastic differential equations. With this model it is possible to simulate the impact of several particle parameters and field sequences on the particle response .

In 2010 Matthias Gräser finished his diploma at the Karlsruhe Institue of Technology (KIT). His diploma thesis investigated the nerve stimulation of magnetic fields in the range from 4 kHz to 25 kHz.

Journal Publications

[76897]
Title: Single-sided magnetic particle imaging: magnetic field and gradient.
Written by: K. Gräfe, M. Grüttner, T.F. Sattel, M. Graeser, and T.M. Buzug
in: <em>Proc. {SPIE}</em>. (2013).
Volume: <strong>8672</strong>. Number:
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DOI: 10.1117/12.2001610
URL: http://dx.doi.org/10.1117/12.2001610
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[www] [BibTex]

Note: inproceedings, Paper ID: 867219

Abstract: {Magnetic Particle Imaging} ({MPI}) has been presented by Gleich and Weizenecker in 2005. Since then, a number of innovations have been introduced by many di erent research groups. In 2009, for instance, Sattel et al. presented a novel single-sided {MPI} scanner geometry. The major advantage of this particular scanner geometry is the unlimited measurement eld. For the imaging process in {MPI}, super-paramagnetic iron oxide nanoparticles ({SPIONs}) are applied as tracer material. The tracer is excited by sinusoidally varying magnetic elds. In this contribution, simulated magnetic elds were evaluated based on the measured eld distribution of a single-sided scanner realization. It is of particular importance to know the quality of the gradient elds, since image resolution in {MPI} is directly linked to the gradient strength.

Conference Proceedings

[76897]
Title: Single-sided magnetic particle imaging: magnetic field and gradient.
Written by: K. Gräfe, M. Grüttner, T.F. Sattel, M. Graeser, and T.M. Buzug
in: <em>Proc. {SPIE}</em>. (2013).
Volume: <strong>8672</strong>. Number:
on pages:
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1117/12.2001610
URL: http://dx.doi.org/10.1117/12.2001610
ARXIVID:
PMID:

[www] [BibTex]

Note: inproceedings, Paper ID: 867219

Abstract: {Magnetic Particle Imaging} ({MPI}) has been presented by Gleich and Weizenecker in 2005. Since then, a number of innovations have been introduced by many di erent research groups. In 2009, for instance, Sattel et al. presented a novel single-sided {MPI} scanner geometry. The major advantage of this particular scanner geometry is the unlimited measurement eld. For the imaging process in {MPI}, super-paramagnetic iron oxide nanoparticles ({SPIONs}) are applied as tracer material. The tracer is excited by sinusoidally varying magnetic elds. In this contribution, simulated magnetic elds were evaluated based on the measured eld distribution of a single-sided scanner realization. It is of particular importance to know the quality of the gradient elds, since image resolution in {MPI} is directly linked to the gradient strength.