[1] Shantou Univ, Coll Med, Affiliated Hosp 2, Dept Radiol, Shantou, Peoples R China
[2] Integrated Tradit Chinese & Western Med Hosp Shen, Dept Radiol, Shenzhen, Peoples R China
[3] Sun Yat Sen Univ, Elect & Informat Engn Coll, Guangzhou, Guangdong, Peoples R China
[4] Shantou Univ, Coll Med, Affiliated Hosp 2, Dept Neurol, Shantou, Peoples R China