Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , which leads to bronchovascular crowding . Retrocardiac opacity is again noted and likely represents atelectasis . No focal consolidation is identified . There is stable moderate cardiomegaly . There is no pleural effusion or pneumothorax . Sternal hardware is unchanged . Left chest pacemaker wires are in unchanged positions .
    OUTPUT:
    
Moderate cardiomegaly . No focal consolidation .