Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is slightly limited by patient rotation . Endotracheal tube has been slightly withdrawn , but remains low lying with tip approximately 1 .5 cm from the carina . Right internal jugular central venous catheter and enteric tubes are in unchanged positions . Mild enlargement of the heart is re - demonstrated with left ventricular predominance . The aorta is diffusely calcified . Lung volumes are low . Pulmonary vasculature is not engorged . Retrocardiac opacity is overall improved from the previous exam , and may reflect atelectasis but infection is not excluded . A probable small left pleural effusion appears unchanged . Right lung is clear . No pneumothorax is clearly identified . Remote left - sided rib fractures are demonstrated .
    OUTPUT:
    
1 . Endotracheal tube has been slightly withdrawn , but tip remains low lying , terminating approximately 1 .5 cm from the carina . 2 . Improved retrocardiac opacity which may reflect atelectasis but infection is not excluded with probable small left pleural effusion .