轻度脂肪肝的MRI化学移位影像学研究

Study on MRI Chemical Shift Imaging of Mild Fatty Liver

目的探讨轻度脂肪肝的MRI化学移位影像学表现。方法对35例正常肝脏和轻度脂肪肝的肝脏进行MRI化学移位同、反位像影像学观察;MRI检查序列为T1WI同相位(in-phase),T1WI反相位(out-phase)。结果 35例正常肝脏T1WI同相位信号基本都为等信号,T1WI反相位呈较高信号。35例轻度脂肪肝的肝脏T1WI同相位信号基本都为等信号,21例T1WI反相位呈等信号,14例呈稍高信号。结论正常肝脏反相位信号多明显高于同相位信号,而肝脏反相位信号等于或稍高于同相位信号时应考虑轻度脂肪肝。

Objective To investigate the MRI chemical shift imaging of the mild fatty liver. Methods To explore the imaging characteristics of MRI chemical shift among 35 cases of normal liver and mild fatty liver. MRI sequence of T1WI phase （in-phase）, T1WI reverse phase （out-phase）. Results The T1WI in phase signal of 35 cases of normal liver were basic signal, the T1WI out phase showed high signal. The T1WI in phase signal of 35 cases of mild fatty liver were equisignal, 21 cases showed equal T1WI reverse phase signal, 14 cases showed slightly higher signal. Conclusion When Liver out-phase signal is equal to or slightly higher than the in-phase signal, it should be considered mild fatty liver.