化学学报 ›› 2007, Vol. 65 ›› Issue (24): 2971-2975. 上一篇    

研究简报

成像核弛豫速率和化学位移与其分子量大小和钆喷酸浓度的相关性

俞开潮1, 肖立平1, 周锦兰*,1, 丁尚武2   

  1. (1华中科技大学化学与化工系 生物无机化学与药物湖北省重点实验室 武汉 430074)
    (2中国科学院武汉物理与数学研究所 波谱与原子分子物理国家重点实验室 武汉 430071)
  • 投稿日期:2006-12-25 修回日期:2007-05-31 发布日期:2007-12-28
  • 通讯作者: 周锦兰

Relevancy of Relaxation Rate and Chemical Shift of Imaging Molecules to the Molecular-weight and Concentration of Magnevist

YU Kai-Chao1; XIAO Li-Ping1; ZHOU Jin-Lan*,1; DING Shang-Wu2   

  1. (1 Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, Department of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074)
    (2 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2006-12-25 Revised:2007-05-31 Published:2007-12-28
  • Contact: ZHOU Jin-Lan

在测试磁共振成像(MRI)用造影剂钆喷酸葡胺(Magnevist)溶液的纵向弛豫速率和化学位移实验中, 观察到溶液中被观测核的弛豫速率加快和化学位移变化与其分子大小和造影剂浓度呈密切的相关性: 对于小分子成像核(水), 弛豫速率和化学位移都与造影剂浓度变化呈很好的线性关系; 而对于大分子成像核(PEG-2000和PEG-6000), 其化学位移和弛豫速率与造影剂浓度变化则呈非线性关系.

关键词: 磁共振成像造影剂, 弛豫, 化学位移, 大分子

An enhancement of the relaxation rates and chemical shift change of imaging nuclei introduced by Magnevist, a mostly used magnetic resonance imaging (MRI) gadolinium contrast agent, was observed. The relaxation enhancement and chemical shift change depend on the size of the molecule where the imaged nuclear species is located and the concentration of Magnevist: the small molecules (water) show a perfect linear relationship between the concentration and the chemical shift change or relaxation enhancement while the macromolecules (PEG-2000 and PEG-6000) show a pronounced nonlinear effect.

Key words: magnetic resonance imaging contrast agent, relaxation, chemical shift, macromolecule