All the patients underwent CT scan (plain and enhanced CT) and MRI. GE 9800 CT, GE Prospeed SX Advantage spiral CT and GE 1.0T Signa Horizon LX MRI were used.

• 检查设备为GE980型CT机；GE Prospeed SX Advantage型螺旋CT机；GE1.；0T Signa Horizon LX型磁共振设备；行CT或/和MRI平扫；然后行产强检查。