Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right PICC terminates in the SVC . Mediastinal drains are noted . Endotracheal tube and nasogastric tube have been removed . Multiple externally located lines overlie the patient . Bilateral chest tubes are in place . Lung volumes are low but there is no focal consolidation or pneumothorax . Retrocardiac atelectasis is improving .
    OUTPUT:
    
Improving retrocardiac atelectasis .