1. Department of Magnetic Resonance Imaging, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, P. R. China
2. Key Laboratory for Functional Magnetic resonance Imaging and Molecular Imaging of Henan Province, Zhengzhou 450002, P. R. China
3. Engineering Research Center of Medical Imaging Intelligent Diagnosis and Treatment of Henan Province, Zhengzhou 450002, P. R. China