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

Journal Publications

[183659]
Title: Flexible Selection Field Generation using Iron Core Coil Arrays.
Written by: F. Foerger, N. Hackelberg, M. Boberg, J.-P. Scheel, F. Thieben, L. Mirzojan, F. Mohn, M. Möddel, M. Graeser, and T. Knopp
in: <em>International Journal on Magnetic Particle Imaging</em>. mar (2023).
Volume: <strong>9</strong>. Number: (1),
on pages: 1-4
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DOI: 10.18416/IJMPI.2023.2303023
URL: https://journal.iwmpi.org/index.php/iwmpi/article/view/624
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[www] [BibTex]

Note: inproceedings, instrumentation, magneticfield

Abstract: Many different concepts for selection-field generators have been introduced for Magnetic Particle Imaging so far. Inthis work, the field generation characteristics of an optimized iron core selection-field generator consisting of twocoil arrays with a total of 18 coils are presented. Due to the high number of degrees of freedom, a wide variety offield configurations are possible. The setup allows the generation of arbitrarily shaped fields, including the standardMagnetic Particle Imaging fields such as field-free points and field-free lines. In this work, field measurements arepresented and the current calculation method for generating a specific field configuration is discussed.

Conference Proceedings

Conference Proceedings

[183659]
Title: Flexible Selection Field Generation using Iron Core Coil Arrays.
Written by: F. Foerger, N. Hackelberg, M. Boberg, J.-P. Scheel, F. Thieben, L. Mirzojan, F. Mohn, M. Möddel, M. Graeser, and T. Knopp
in: <em>International Journal on Magnetic Particle Imaging</em>. mar (2023).
Volume: <strong>9</strong>. Number: (1),
on pages: 1-4
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.18416/IJMPI.2023.2303023
URL: https://journal.iwmpi.org/index.php/iwmpi/article/view/624
ARXIVID:
PMID:

[www] [BibTex]

Note: inproceedings, instrumentation, magneticfield

Abstract: Many different concepts for selection-field generators have been introduced for Magnetic Particle Imaging so far. Inthis work, the field generation characteristics of an optimized iron core selection-field generator consisting of twocoil arrays with a total of 18 coils are presented. Due to the high number of degrees of freedom, a wide variety offield configurations are possible. The setup allows the generation of arbitrarily shaped fields, including the standardMagnetic Particle Imaging fields such as field-free points and field-free lines. In this work, field measurements arepresented and the current calculation method for generating a specific field configuration is discussed.