Iron oxide nanoparticles enhancing magnetic resonance imaging: A review of the latest advancements

被引:0
|
作者
Aboushoushah, Samia Faisal O. [1 ]
机构
[1] King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia
来源
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES | 2025年 / 10卷 / 02期
关键词
Iron oxide nanoparticles; Magnetic resonance imaging; Contrast agents; Size; Surface modification; Relaxivity; MRI CONTRAST AGENTS; DESIGN;
D O I
10.1016/j.jsamd.2025.100875
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This review explores the advancements in iron oxide nanoparticles (IONPs) as MRI contrast agents, emphasizing their synthesis, surface engineering, and impact on MRI contrast enhancement. While gadolinium-based contrast agents (GBCAs) remain the clinical standard for T-1-weighted imaging, their safety concerns have driven research toward IONPs as promising alternatives. Ultra-small IONPs (<5 nm) exhibit strong T-1 contrast enhancement, while larger IONPs (>20 nm) provide superior T-2 contrast due to their high r(2) relaxivity. Additionally, recent developments in T-1/T-2 switchable IONPs enable dynamic contrast modulation through controlled size, shape, and stimuli-responsive surface modifications, enhancing tumour imaging specificity. This review examines diverse surface engineering strategies, including protein, polysaccharide, polymer, lipid, mesoporous silica, and hybrid coatings, that enhance biocompatibility, circulation time, and targeting efficiency. Despite their potential, IONPs face challenges in clinical translation, including regulatory hurdles, inconsistent targeting efficiency, and long-term safety concerns. Addressing these limitations through optimized formulations, biocompatibility-focused designs, and rigorous preclinical evaluation will be crucial for their successful integration into clinical MRI diagnostics. Our findings suggest that IONPs not only mitigate many limitations of conventional contrast agents but also pave the way for precision imaging and personalized medicine, redefining the future of MRI contrast technology.
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页数:31
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