All 1H MRS examinations were performed on a Singa Horizont 1.5 T whole body MR system with point resolved spectroscopy (PRESS) and chemical-shift selective saturation (CHESS) (TR=2000?ms,TE=144 ?ms).

• 所有病例均先进行MRI检查 ,再进行1HMRS检查 ,1HMRS采用点分辨波谱分析法及化学位移选择饱和水抑制法采集信号。 成像参数为tr2 0 0 0ms ,TE14 4ms ;