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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 15 — Jul. 21, 2008
  • pp: 11525–11539

Phase-resolved magnetomotive OCT for imaging nanomolar concentrations of magnetic nanoparticles in tissues

Amy L. Oldenburg, Vasilica Crecea, Stephanie A. Rinne, and Stephen A. Boppart  »View Author Affiliations


Optics Express, Vol. 16, Issue 15, pp. 11525-11539 (2008)
http://dx.doi.org/10.1364/OE.16.011525


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Abstract

Magnetic nanoparticles (MNPs) are increasingly important in magnetic resonance and biomedical optical imaging. We describe a method for imaging MNPs by detecting nanoscale displacements using a phase-resolved spectral-domain optical coherence tomography (OCT) system. Biological tissues and phantoms are exposed to ∼800 G magnetic fields modulated at 56 and 100 Hz to mechanically actuate embedded iron oxide MNPs (∼20 nm diameter). Sensitivity to 27 μg/g (∼2 nM) MNPs within tissue phantoms is achieved by filtering paramagnetic from diamagnetic vibrations. We demonstrate biological feasibility by imaging topically applied MNPs during their diffusion into an excised rat tumor over a 2 hour time period.

© 2008 Optical Society of America

OCIS Codes
(160.3820) Materials : Magneto-optical materials
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: May 28, 2008
Revised Manuscript: July 3, 2008
Manuscript Accepted: July 7, 2008
Published: July 18, 2008

Virtual Issues
Vol. 3, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Amy L. Oldenburg, Vasilica Crecea, Stephanie A. Rinne, and Stephen A. Boppart, "Phase-resolved magnetomotive OCT for imaging nanomolar concentrations of magnetic nanoparticles in tissues," Opt. Express 16, 11525-11539 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-15-11525


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