Complex Relationship Between Iron Oxide Nanoparticle Degradation and Signal Intensity in Magnetic Particle Imaging.

Complex Relationship Between Iron Oxide Nanoparticle Degradation and Signal Intensity in Magnetic Particle Imaging.
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DOI:
10.1021/acsanm.0c00779
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发表时间:
2020-05-22
影响因子:
5.9
通讯作者:
Shapiro EM
Shapiro EM
中科院分区:
材料科学2区
文献类型:
--
作者:
Guzy J;Chakravarty S;Buchanan FJ;Chen H;Gaudet JM;Hix JML;Mallett CL;Shapiro EM

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Magnetic particle imaging (MPI), using superparamagnetic nanoparticles as an imaging tracer, is touted as a quantitative biomedical imaging technology, but MPI signal properties have never been characterized for magnetic nanoparticles undergoing biodegradation. We show that MPI signal properties can increase or decrease as iron oxide nanoparticles degrade, depending on the nanoparticle formulation and nanocrystal size, and degradation rate and mechanism. Further, we show that long-term in vitro MPI experiments only roughly approximate long-term in vivo MPI signal properties. Further, we demonstrate for the first time, an environmentally sensitive MPI contrast mechanism opening the door to smart contrast paradigms in MPI.
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