1. Laboratory of Veterinary Clinical Radiology, Faculty of Applied Biological Sciences, Gifu University, Gifu 501–1193, Japan
2. Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt
3. Department of Anesthesiology and Pain Medicine, School of Medicine, Gifu University, Gifu 501–1194, Japan
4. YABASHI INDUSTRIES CO., LTD., Ogaki, Gifu 503–2213, Japan
5. Department of Small Animal Clinical Sciences, Rakuno Gakuen University, 582 Bunkyoudai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan
6. Present address: Laboratory of Veterinary Diagnostic Imaging, Cooperative Department of Veterinary Medicine, Iwate University, Ueda-cho, Morioka 020–8550, Japan