Chinese Journal of Magnetic Resonance ›› 2022, Vol. 39 ›› Issue (1): 11-19.doi: 10.11938/cjmr20212902

• Articles • Previous Articles     Next Articles

Dual-modal MRI T1-T2 Contrast Agent Based on Dynamic Organic Gadolinium Nanoparticles

Ju-min ZHANG1,2,Shi-zhen CHEN1,2,*(),Xin ZHOU1,2   

  1. 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
    2. University of Chinese Academy of Science, Beijing 100049, China
  • Received:2021-03-30 Online:2022-03-05 Published:2021-05-11
  • Contact: Shi-zhen CHEN E-mail:chenshizhen@wipm.ac.cn

Abstract:

In this work, a new magnetic resonance imaging (MRI) contrast agent based on organic gadolinium (Gd) nanoparticles was designed, synthesized and tested. Based on a biocompatible condensation reaction between 1, 2-aminothiol and cyano group, organic Gd nanoparticles with well-controlled diameter in the range of 8~23 nm were successfully synthesized. When used as the MRI contrast agent, the organic Gd-nanoparticles exhibited slowly weakened longitudinal relaxivity with time. Meanwhile, its transverse relaxivity was observed to be enhanced firstly and then gradually weakened, which could be attributed to the diameter increase of the Gd-nanoparticles. The simultaneous existence of time-dependent longitudinal and transverse relaxivities of the organic Gd-nanoparticles suggests their potential to be advanced T1-T2 dual-modal contrast agent for MRI.

Key words: magnetic resonance imaging (MRI), contrast agent, dual modality, nanoparticle

CLC Number: