1. Department of Imaging Equipment and Technology Medical Technology Academy, Qiqihar Medical University Heilongjiang China
2. Micromorphology Research Center, Medical Pathology Academy, Qiqihar Medical University Heilongjiang China
3. Department of Ultrasound The Second Affiliated Hospital of Qiqihar Medical University Heilongjiang China
4. Department of Magnetic Resonance The Third Affiliated Hospital of Qiqihar Medical University Heilongjiang China