| 摘要: |
| Gd、Ho和Dy因其独特的光学和磁学性质而在生物成像等方面有着广泛的应用.在镧系元素中，Gd3+具有7个不成对的电子，可以提供高的弛豫度，已被广泛地用于磁共振成像（MRI）造影剂，而Ho3+和Dy3+具有最短的电子弛豫时间和最高的有效磁矩，因此有良好的高场T2弛豫效果.介绍了基于这3种稀土元素的纳米材料在MRI方面的应用. |
| 关键词: 稀土 纳米材料 磁共振成像 |
| DOI：10.3969/J.ISSN.1000-5137.2017.06.005 |
| 分类号:O613.7 |
| 基金项目:教育部环境功能材料创新团队（IRT_16R49） |
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| Research progress of Gd,Ho,and Dy in magnetic resonance imaging |
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Liu Yan, Shi Tingting, Wu Huixia, Yang Shiping
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College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| Gd,Ho,and Dy have been widely used in biological imaging because of their excellent optical and magnetic properties.In particular,Gd3+ is extensively applied in MRI field because Gd3+ has 7 unpaired electrons which offer high relaxation degree.Among all lanthanides,Ho3+ and Dy3+ have the most efficient T2 relaxation at high magnetic field due to their shortest electronic relaxation time and the highest effective magnetic moment.Herein,the applications of these three rare earth element-based nanomaterials in magnetic resonance imaging (MRI) are reviewed. |
| Key words: rare earth nanomaterials magnetic resonance imaging |
