RARE EARTH-BASED NANOPARTICLE MAGNETIC RESONANCE CONTRAST AGENT AND PREPARATION METHOD THEREOF
申请人:PEKING UNIVERSITY
公开号:US20170196997A1
公开(公告)日:2017-07-13
A rare earth-based nanoparticle magnetic resonance contrast agent and a preparation method thereof are provided. The rare earth-based nanoparticle magnetic resonance contrast agent is rare earth-based inorganic nanoparticles having the surfaces coated with hydrophilic ligands. The rare earth-based nanoparticles are first obtained by a high-temperature oil phase reaction, and then the surfaces thereof are coated with hydrophilic molecules to obtain the rare earth-based nanoparticle magnetic resonance contrast agent. Compared with the existing clinical contrast agent, the magnetic resonance contrast agent of the present invention has a greatly improved relaxivity, a good imaging effect, a low required injection dose, and long in vivo residence time. In addition, the rigid structure of the inorganic nanoparticles can effectively reduce the leakage possibility of gadolinium ions.
提供一种基于稀土的纳米颗粒磁共振造影对比剂及其制备方法。该基于稀土的纳米颗粒磁共振造影对比剂是表面涂覆有亲水性配体的稀土基无机纳米颗粒。首先通过高温油相反应获得这些基于稀土的纳米颗粒,然后将其表面涂覆亲水性分子以获得基于稀土的纳米颗粒磁共振造影对比剂。与现有的临床对比剂相比,本发明的磁共振造影对比剂具有大大提高的弛豫率、良好的成像效果、低的注射剂量要求和长的体内滞留时间。此外,无机纳米颗粒的刚性结构可以有效降低钆离子泄漏的可能性。