磁共振成像是根据生物磁性核在磁场中表现的共振特性进行成像的新技术，其中弛豫时间是实现和控制成像的重要物理量. 本文使用磁共振成像实验仪，对相关样品的纵向弛豫时间T1、横向弛豫时间T2进行测量，并且基于不同弛豫时间采用自旋回波序列实现T1、T2加权像，用反转恢复成像序列实现磁共振成像对脂肪的抑制. 

Magnetic resonance imaging is a new imaging technology based on the resonance characteristics of biological magnetic nuclei in magnetic field, in which relaxation time is an important physical quantity to realize and control imaging. In this paper, the longitudinal relaxation time  T1 and the transverse relaxation time T2 of relevant samples were measured by magnetic resonance imaging instrument. T1 and T2 weighted images were achieved by soft pulse spin echo sequences based on different relaxation times. Fat suppression was realizes by magnetic resonance imaging with reverse recovery imaging sequences.