【摘要】 目的 用经典物理学的理论研究MRI中扩散类型及其测量。方法 将经典物理学的扩散理论应用到MRI。结果 MRI中的扩散现象分为自由扩散、受限扩散、各向异性扩散三种类型。采用扩散系数的测量可获得相应扩散图像。结论 各种类型的扩散系数都可利用经典物理学的方法测量得到。

    【关键词】 经典物理学；扩散；类型；测量

    The diffuse type and its measuring theories in MRI

    JI Qiang,LI Dian-shuang,WEI Zhi-jian,et al.

    Department of Medical Imaging,Tianjin Medical University,Tianjin 300203,China

    【Abstract】 Objective To research the types of diffusion in MRI and its measurement by the theory in classical physics.Methods To apply the diffuse theory in classical physics to MRI.Results The diffuse phenomenon of MRI can be divided into three types,free diffusion,limited diffusion and anisotropic diffusion.We can get corresponding diffuse image by measuring diffusion coefficients.Conclusion Diffuse coefficient of each type can be measured by classical physics.

    【Key words】 classical physics;diffusion;type;measurement

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