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• W2887669853 abstract "Contrast agents for magnetic resonance imaging (MRI) are essential for evidential visualization of soft tissues pathologies. Contrast-enhanced MRI can be carried out with T1- and T2-weighted sequences that require as contrast agents paramagnetic and superparamagnetic materials, respectively. The T1-weighted imaging is frequently preferred over T2-, as it induces a bright contrast for sharper image analysis and allows more rapid image acquisition. Commonly used and FDA-approved T1 contrast agents, however, were shown to be associated with nephrogenic systematic fibrosis due to Gd3+ release from the injected complexes. Here, ultrasmall iron oxide nanocrystals are produced by scalable flame aerosol technology and investigated as T1 MRI contrast agents by focusing on structure-function relationships and cytocompatibility. The optimized nanocrystals are shown to be a promising cytocompatible alternative to commercial Gd-complexes as they attain comparable relaxivities with no apparent cytotoxicity at clinically relevant concentrations tested in vitro against four different cell types (PC3, HepG2, THP-1, and red blood cells). By using SiO2 as a spacing material, the contrast enhancement could be finely tuned by decreasing the effective magnetic size of iron oxide resulting in significant T1 contrast enhancement due to reduced magnetic coupling." @default.
• W2887669853 created "2018-08-22" @default.
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• W2887669853 date "2018-08-07" @default.
• W2887669853 modified "2023-10-16" @default.
• W2887669853 title "Reduced Magnetic Coupling in Ultrasmall Iron Oxide T₁ MRI Contrast Agents" @default.
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• W2887669853 doi "https://doi.org/10.1021/acsabm.8b00244" @default.
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