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

[76883]
Title: Safety aspects for a pre-clinical {Magnetic Particle Imaging} scanner. <em>{Magnetic Particle Imaging}</em>
Written by: G. Bringout, H. Wojtczyk, M. Grüttner, M. Graeser, W. Tenner, J. Hägele, F.M. Vogt, J. Barkhausen and T.M. Buzug
in: (2012).
Volume: Number: (140),
on pages: 355--359
Chapter:
Editor:
Publisher:
Series: Springer Proceedings in Physics
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1007/978-3-642-24133-8_57
URL: http://link.springer.com/chapter/10.1007/978-3-642-24133-8_57
ARXIVID:
PMID:

[www] [BibTex]

Note: inproceedings

Abstract: {Magnetic Particle Imaging} is a promising new imaging technique using magnetic fields to image magnetic tracer material in the body. As with {MRI} systems, time varying magnetic fields raise some safety issues. The stimulation of peripheral nerves and tissues is one of them. In the paper, the stimulation thresholds are explained and an evaluation of the stimulation generated by a pre-clinical scanner is calculated. It appears clearly that, even if driving fields of high amplitude are used, cardiac arrhythmias are unlikely to be induced. However, it is yet unclear whether some peripheral nerve stimulation may be induced.

Conference Proceedings

[76883]
Title: Safety aspects for a pre-clinical {Magnetic Particle Imaging} scanner. <em>{Magnetic Particle Imaging}</em>
Written by: G. Bringout, H. Wojtczyk, M. Grüttner, M. Graeser, W. Tenner, J. Hägele, F.M. Vogt, J. Barkhausen and T.M. Buzug
in: (2012).
Volume: Number: (140),
on pages: 355--359
Chapter:
Editor:
Publisher:
Series: Springer Proceedings in Physics
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1007/978-3-642-24133-8_57
URL: http://link.springer.com/chapter/10.1007/978-3-642-24133-8_57
ARXIVID:
PMID:

[www] [BibTex]

Note: inproceedings

Abstract: {Magnetic Particle Imaging} is a promising new imaging technique using magnetic fields to image magnetic tracer material in the body. As with {MRI} systems, time varying magnetic fields raise some safety issues. The stimulation of peripheral nerves and tissues is one of them. In the paper, the stimulation thresholds are explained and an evaluation of the stimulation generated by a pre-clinical scanner is calculated. It appears clearly that, even if driving fields of high amplitude are used, cardiac arrhythmias are unlikely to be induced. However, it is yet unclear whether some peripheral nerve stimulation may be induced.