There are two types of relaxation: longitudinalrelaxation, which is the time (T1) needed to align protons in a static magnetic field;
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；
2
A mathematical formula of the relation between longitudinalrelaxation or transverse relaxation and the flip Angle of magnetization vector was deduced and its programme was designed.
首先推导出纵向弛豫和横向弛豫与磁化强度矢量偏转角关系的数学表达式。
3
The result shows that sag resistances of the tubing resins have a close relationship with NMR relaxation properties. Resins with longer longitudinalrelaxation time possess better sag resistances.