MRCP成像的快速弛豫增强序列(rapid acquisition with relaxation enhancement,RARE),主要有稳态自由进动序列(steady state free precession sequence SSFP),快速自旋回波序列(fast spin echo sequence,FSE)序列。半傅里叶采集单次激发快速自旋回波序列(half - Fourier acquisition singl _ shot turbo spin _ echo sequence,HASTE ......