MR diffusion-weighted imaging(DWI) reflects the microscopic Brownian motion of water molecules. It is a new technology for disease research from the cellular and molecular level.
磁共振弥散加权成像（DWI）反映了水分子的微观弥散运动，是从细胞及分子水平来进行疾病研究的新技术；
With the proposing of the molecular imaging, the transplanted cells can be tracked in vivo by MR imaging, nuclear imaging and optical imaging.
随着分子影像学的提出，能通过活体检测移植后的细胞，方法主要有磁共振成像、核医学成像、光学成像。
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