1. Department of Radiology, Yamagata University Hospital
2. Department of Radiology and Nuclear Medicine, Akita Cerebrospinal and Cardiovascular Center
3. Department of Radiological Technology, Tohoku University Hospital
4. Department of Radiological Technology, Miyagi Cancer Center (Current address: Department of Radiology, Fujita Health University Hospital)
5. Department of Radiology, Ohara General Hospital
6. Department of Radiological Imaging and Informatics, Tohoku University Graduate School of Medicine