CALCULATION OF THE CARDIOTHORACIC RATIO FROM PORTABLE ANTEROPOSTERIOR CHEST RADIOGRAPHY

¹Department of Emergency Medicine, Kangwon National University Hospital, Chuncheon, Korea, ²Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea, ³Department of Emergency Medicine, Kangwon National University School of Medicine, Chuncheon, Korea, and ⁴Department of Radiology, Kangwon National University School of Medicine, Chuncheon, Korea