Magnetoacoustic imaging of magnetic iron oxide nanoparticles embedded in biological tissues with microsecond magnetic stimulation

Gang Hu, Bin He

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36 Scopus citations

Abstract

We present an experimental study on magnetoacoustic imaging of superparamagnetic iron oxide (SPIO) nanoparticles embedded in biological tissues. In experiments, a large-current-carrying coil is used to deliver microsecond pulsed magnetic stimulation to samples. The ultrasound signals induced by magnetic forces on SPIO nanoparticles are measured by a rotating transducer. The distribution of nanoparticles is reconstructed by a back-projection imaging algorithm. The results demonstrated the feasibility to obtain cross-sectional image of magnetic nanoparticle targets with faithful dimensional and positional information, which suggests a promising tool for tomographic reconstruction of magnetic nanoparticle-labeled diseased tissues (e.g., cancerous tumor) in molecular or clinic imaging.

Original languageEnglish (US)
Article number013704
JournalApplied Physics Letters
Volume100
Issue number1
DOIs
StatePublished - Jan 2 2012

Bibliographical note

Funding Information:
The authors are grateful to Tanmoy Sadhukha for useful discussions on magnetic nanoparticle characterization. This work was supported in part by NIH R21EB006070, RO1EB006433, and RO1EB007920.

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