有两种类型的驰豫：纵向驰豫，静磁场中质子定向排列所需的时间T1；

There are two types of relaxation: longitudinal relaxation, which is the time (T1) needed to align protons in a static magnetic field;

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有两种类型的驰豫：纵向驰豫，静磁场中质子定向排列所需的时间T1；

There are two types of relaxation: longitudinal relaxation, which is the time (T1) needed to align protons in a static magnetic field;

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