Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP views of the chest were obtained approximately 1 hr apart . On the initial radiograph , the patient is intubated with the tip of the endotracheal tube residing 4 .1 cm above the carinal . An NG tube courses into the left upper quadrant . On the second radiograph a right IJ central venous catheter has been placed with its tip in the low SVC region . The lungs are hyperlucent reflecting known severe emphysema . No focal consolidation , large effusion or supine evidence for pneumothorax . The heart and mediastinal contours appear normal . Bony structures are intact .
    OUTPUT:
    
Lines and tubes positioned as described . Lucent lungs compatible with emphysema . Please refer to subsequent CT of the chest for further details .