Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . The lungs are clear . There is no visualized apical pneumothorax on the current exam . Trace left pleural fluid versus pleural thickening seen posteriorly . Cardiac silhouette is enlarged but stable . Median sternotomy wires and mediastinal clips again noted .
    OUTPUT:
    
No acute cardiopulmonary process .