Department of Radiological Technology, Tokushima University School of Health Sciences, Tokushima, Japan;
Department of Radiology, Kansai Electric Power Hospital, Osaka, Japan;
Department of Radiological Technology, Tokushima University School of Health Sciences, Tokushima, Japan;
Department of Radiological Technology, University of Miyazaki Hospital, Miyazaki, Japan;
Subdivision of Biomedical Information Sciences, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan;
X-Ray; Fluoroscopic; System; Signal-to-Noise; Ratio; Howlett; Chart; Visibility;