Department of Radiology;
First Affiliated Hospital of Dalian Medical University;
Dalian 116011;
Liaoning Province;
China;
Department of Radiology;
Bering TongRen Hospital;
Capital Medical University;
Beijing 100730;
China;
Department of Neurology;
First Affiliated Hospital of Dalian Medical University;
Dalian 116011;
Liaoning Province;
China;