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Updated: Jul 23, 2025

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
Published on: July 21, 2011
A trade-off between ligand coating and crystallinity of Gd-doped ultrasmall CeO2 for improving relaxivity
Qian Ma1, Hui Wang1, Qiangqiang Nie2
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China. lywang@mail.buct.edu.cn.
Abstract:
A Gd-doped ultrasmall CeO2 contrast agent was prepared with high longitudinal relaxivity (r1 = 10.1 mM-1 s-1, 7.0 T) through rationally regulating the crystallinity and surface coatings, providing a new paradigm for optimizing MRI performance. Moreover, responsive photoacoustic imaging (PAI) was established via tumor microenvironment-triggered oxidation, affording dual-modal imaging.

