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Medical Physics / Volume 37 / Issue 7 / MEDICAL PHYSICS LETTERS

Med. Phys. 37, 3538 (2010); http://dx.doi.org/10.1118/1.3447726 (3 pages)

Efficient generation of a magnetic field-free line

Tobias Knopp, Marlitt Erbe, Sven Biederer, Timo F. Sattel, and Thorsten M. Buzug

Institute of Medical Engineering, University of Lübeck, Lübeck 23538, Germany

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(Received 11 January 2010; accepted 17 May 2010; revised 6 April 2010; published online 15 June 2010)

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Purpose: Signal encoding in magnetic particle imaging (MPI) is achieved by moving a field-free point (FFP) through the region of interest. One way to increase the sensitivity of the method is to scan the region of interest with a field-free line (FFL) instead of the FFP. Recently, the first feasible FFL coil setup was introduced. The purpose of this article is to improve the efficiency of the FFL coil geometry even further.
Methods: In order to reduce the electrical power loss of the setup, an additional Maxwell coil pair is introduced that is tailored to generate the static part of the FFL field.
Results: Using the proposed coil assembly, the electrical power loss for the generation of a rotating FFL is considerably reduced compared to previously known coil setups. Furthermore, the quality of the generated FFL is significantly increased.
Conclusions: The proposed coil assembly is almost as efficient as an equivalent FFP scanner. Furthermore, the assembly cannot only be used for FFL imaging but for FFP imaging as well. Hence, the findings of this article denote an important step toward the first practical implementation of the FFL coil geometry.

© 2010 American Association of Physicists in Medicine

Article Outline

  1. INTRODUCTION
  2. COIL GEOMETRIES
  3. CONCLUSION
Digital Object Identifier
http://dx.doi.org/10.1118/1.3447726

KEYWORDS and PACS

Keywords

biomagnetism, biomedical imaging, encoding, magnetic particles, nanobiotechnology, nanoparticles, magnetic particle imaging, SPIO, field-free line, optimized coil topology, Maxwell coil pair

PACS

  • 87.85.Pq

    Biomedical imaging

  • 87.50.C-

    Static and low-frequency electric and magnetic fields effects

  • 87.85.Rs

    Nanotechnologies-applications

PUBLICATION DATA

ISSN

0094-2405 (print)  

Publisher

$abstract.society.value is a Member of CrossRef American Association of Physicists in Medicine

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