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Related Experiment Video

Updated: Jan 20, 2026

Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles
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Imaging Magnetic Nanoparticle Distributions by Atomic Magnetometry-Based Susceptometry.

Simone Colombo, Victor Lebedev, Alexey Tonyushkin

    IEEE Transactions on Medical Imaging
    |September 4, 2019
    PubMed
    Summary

    We developed a Magnetic Particle Imaging Susceptometer (MPIS) using an atomic magnetometer (AM) to map magnetic nanoparticles. This technique achieves sub-millimeter resolution and is less harmful to biological samples than traditional Magnetic Particle Imaging (MPI).

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    Area of Science:

    • Biomedical Engineering
    • Nanotechnology
    • Medical Imaging

    Background:

    • Magnetic Particle Imaging (MPI) is a promising technique for visualizing magnetic nanoparticles.
    • Conventional MPI methods face limitations in resolution and potential harm to biological samples due to high driving frequencies and field amplitudes.

    Purpose of the Study:

    • To introduce a novel Magnetic Particle Imaging Susceptometer (MPIS) utilizing a high-sensitivity atomic magnetometer (AM).
    • To evaluate the performance and potential benefits of MPIS for biological applications.

    Main Methods:

    • MPIS employs an atomic magnetometer (AM) for recording nanoparticle spatial distribution.
    • The system uses a low-frequency excitation scheme (around 100 Hz) and a simple source localization algorithm.
    • Data is acquired in time-space, capturing all Fourier components of the magnetic response.

    Main Results:

    • MPIS achieved resolutions of approximately 2.5 mm before deconvolution and sub-millimeter resolution after deconvolution.
    • The system operates at lower frequencies, allowing the use of larger nanoparticles.
    • Lower excitation field amplitudes are required, reducing potential harm to biological samples.

    Conclusions:

    • MPIS offers a high-resolution, less invasive alternative to conventional MPI.
    • The technology shows potential for improved imaging of magnetic nanoparticles in biological and medical applications.
    • MPIS demonstrates significant advantages in terms of resolution, nanoparticle size flexibility, and safety for biological subjects.