Efficient Positioning of the Field-Free Point in Magnetic Particle Imaging

  • Tobias KnoppEmail author
  • Timo F. Sattel
  • Thorsten M. Buzug
Part of the Springer Proceedings in Physics book series (SPPHY, volume 140)


Magnetic particle imaging uses a field with a single field-free point for spatial encoding. Such a gradient field can be generated by a Maxwell coil pair consisting of two opposing coils driven by current flowing in converse directions. In order to sample the volume in-between the coils, the field-free point has to be moved through space. When keeping the gradient strength constant the electrical power loss of the Maxwell coil pair setup drastically increases when moving the field-free point off-center. In this paper a coil configuration is proposed, which consists of four coils and considerably reduces the electrical power loss for off-center field-free point generation.


Magnetic Particle Power Loss Magnetic Gradient Field Gradient Strength Converse Direction 
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Copyright information

© Springer-Verlag GmbH Berlin Heidelberg 2012

Authors and Affiliations

  • Tobias Knopp
    • 1
    Email author
  • Timo F. Sattel
    • 1
  • Thorsten M. Buzug
    • 1
  1. 1.Institute of Medical EngineeringUniversity of LübeckLübeckGermany

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