1. Graduate School of Health Sciences, Fujita Health University, Toyoake 470-1192, Japan
2. Faculty of Information Engineering, Meijo University, Nagoya 468-8502, Japan
3. Faculty of Engineering, Gifu University, Gifu 501-1193, Japan
4. Department of Artificial Intelligence Diagnostic Radiology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
5. Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan