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Annals of Biomedical Engineering

, Volume 34, Issue 1, pp 23–38 | Cite as

Superparamagnetic Iron Oxide Nanoparticle Probes for Molecular Imaging

  • Daniel L. J. Thorek
  • Antony K. Chen
  • Julie Czupryna
  • Andrew Tsourkas
Nanobioengineering

Abstract

The field of molecular imaging has recently seen rapid advances in the development of novel contrast agents and the implementation of insightful approaches to monitor biological processes non-invasively. In particular, superparamagnetic iron oxide nanoparticles (SPIO) have demonstrated their utility as an important tool for enhancing magnetic resonance contrast, allowing researchers to monitor not only anatomical changes, but physiological and molecular changes as well. Applications have ranged from detecting inflammatory diseases via the accumulation of non-targeted SPIO in infiltrating macrophages to the specific identification of cell surface markers expressed on tumors. In this article, we attempt to illustrate the broad utility of SPIO in molecular imaging, including some of the recent developments, such as the transformation of SPIO into an activatable probe termed the magnetic relaxation switch.

Keywords

Molecular imaging Nanoparticles SPIO Magnetic resonance 

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Copyright information

© Biomedical Engineering Society 2006

Authors and Affiliations

  • Daniel L. J. Thorek
    • 1
  • Antony K. Chen
    • 1
  • Julie Czupryna
    • 1
  • Andrew Tsourkas
    • 1
    • 2
  1. 1.Cellular and Molecular Imaging Group, Department of BioengineeringUniversity of PennsylvaniaPhiladelphiaUSA
  2. 2.Cellular and Molecular Imaging Group, Department of BioengineeringUniversity of PennsylvaniaPhiladelphiaUSA

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