Ferromagnetic particles as magnetic resonance imaging temperature sensors

J. H. Hankiewicz (), Z. Celinski, K. F. Stupic, N. R. Anderson and R. E. Camley
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J. H. Hankiewicz: UCCS Center for the BioFrontiers Institute, University of Colorado
Z. Celinski: UCCS Center for the BioFrontiers Institute, University of Colorado
K. F. Stupic: National Institute of Standards and Technology
N. R. Anderson: UCCS Center for the BioFrontiers Institute, University of Colorado
R. E. Camley: UCCS Center for the BioFrontiers Institute, University of Colorado

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Magnetic resonance imaging is an important technique for identifying different types of tissues in a body or spatial information about composite materials. Because temperature is a fundamental parameter reflecting the biological status of the body and individual tissues, it would be helpful to have temperature maps superimposed on spatial maps. Here we show that small ferromagnetic particles with a strong temperature-dependent magnetization, can be used to produce temperature-dependent images in magnetic resonance imaging with an accuracy of about 1 °C. This technique, when further developed, could be used to identify inflammation or tumours, or to obtain spatial maps of temperature in various medical interventional procedures such as hyperthermia and thermal ablation. This method could also be used to determine temperature profiles inside nonmetallic composite materials.

Date: 2016
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DOI: 10.1038/ncomms12415

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