1. Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
2. Division of Rheumatology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
3. Department of Radiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand. wpunth@kku.ac.th