Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . Mediastinal drains have been removed . There is no interval mediastinal widening . There is no pneumothorax . Compared to prior study from 1 day ago , pulmonary edema has significantly improved . There are slightly increased retrocardiac and right base opacities , likely due to atelectasis . Endotracheal tube is in appropriate position . Right - sided Swan - Ganz catheter terminates just beyond the pulmonic valve . Median sternotomy wires are intact . Nasogastric tube terminates in the stomach .
    OUTPUT:
    
No pneumothorax . No interval mediastinal widening .