1. Division of Radiology, Department of Medical Technology; Kyushu University Hospital; Fukuoka Japan
2. Department of Radiological Technology, Faculty of Fukuoka Medical Technology; Teikyo University; Fukuoka Japan
3. Sleep Apnea Center; Kyushu University Hospital; Fukuoka Japan
4. Department of Cardiovascular Medicine, Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
5. Department of Diagnostic Imaging and Nuclear medicine; Tokyo Women's Medical University; Tokyo Japan