Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and mitral valve replacement . Right - sided dual lumen central venous catheter tip terminates in the right atrium , unchanged . Mild enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are similar . Pulmonary vasculature is not engorged . Streaky atelectasis is noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality .