磁共振弹性成像及其在脑疾病中的应用

冯原, 邱苏豪, 严福华, 杨广中

Magnetic Resonance Elastography and Its Application in Brain Diseases

FENG Yuan, QIU Suhao, YAN Fuhua, YANG Guang-Zhong

图1 基于GRE的MRE序列示意. 在常规梯度回波的成像基础上，可以分别在SS、PE、RO方向加载位移编码梯度，从而对所加载方向的位移进行编码. SS：扫描层面选择；PE：相位编码；RO：读出梯度；θ：所施加的位移编码梯度与波动的相位差

Fig. 1 A typical MRE sequence based on gradient-echo imaging. Motion-encoding gradients can be applied to either SS, PE, or RO directions based on conventional gradient-echo sequence. SS: slice selection; PE: phase encoding; RO: readout; θ: phase offset between the motion encoding gradient and the harmonic motion