Prof. Dr.-Ing. Tobias Knopp

Universitätsklinikum Hamburg-Eppendorf (UKE)
Sektion für Biomedizinische Bildgebung
Lottestraße 55
2ter Stock, Raum 209
22529 Hamburg
Tel.: 040 / 7410 56794
Fax: 040 / 7410 45811
E-Mail: t.knopp(at)

Technische Universität Hamburg (TUHH)
Institut für Biomedizinische Bildgebung
Gebäude E, Raum 4.044
Am Schwarzenberg-Campus 3
21073 Hamburg
E-Mail: tobias.knopp(at)




  • Head of the Institute for Biomedical Imaging
  • Editor-in-chief of the International Journal on Magnetic Particle Imaging (IJMPI)

Consulting Hours

  • On appointment

Research Interests

  • Tomographic Imaging
  • Image Reconstruction
  • Signal- and Image Processing
  • Magnetic Particle Imaging

Curriculum Vitae

Tobias Knopp received his Diplom degree in computer science in 2007 and his PhD in 2010, both from the University of Lübeck with highest distinction. For his PHD on the tomographic imaging method Magnetic Particle Imaging (MPI) he was awarded with the Klee award from the DGBMT (VDE) in 2011. From 2010 until 2011 he led the MAPIT project at the University of Lübeck and published the first scientific book on MPI. In 2011 he joined Bruker Biospin to work on the first commercially available MPI system. From 2012 until 2014 he worked at Thorlabs in the field of Optical Coherence Tomography (OCT) as a software developer. In 2014 he has been appointed as Professor for experimental Biomedical Imaging at the University Medical Center Hamburg-Eppendorf and the Hamburg University of Technology.


Title: Influence of the Receive Channel Number on the Spatial Resolution in Magnetic Particle Imaging 7th International Workshop on Magnetic Particle Imaging (IWMPI 2017)
Written by: P. Szwargulski and T. Knopp
in: 2017
Volume: Number:
on pages: 91
how published:


Note: inproceedings

Abstract: Magnetic Particle Imaging (MPI) is a fast and highly sensitive tomographic imaging modality. When applying 3D Lissajous imaging sequences, the region of interest is rapidly sampled by moving a field-free point along a predefined trajectory. Since the field excitation is done using three orthogonal excitation coils, usually also the magnetization response is measured with three independent and orthogonal receive coils. In this work the influence of selecting a subset of receive channels during reconstruction on the resulting image quality is analyzed. It is shown that using a single receive channel a slight loss of spatial resolution in the order of 12–22% in the direction perpendicular to the receiving direction can be observed while in direction of the receive coil the resolution is preserved and partially even improved. Since the construction of decoupled 3D receive coil units is a major engineering effort, the findings can be used to simplify the construction of 3D Lissajous type scanners.