Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal image of the chest . Median sternotomy wires are noted . The lungs are well expanded . Opacity in the right lung base likely represents atelectasis . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is mildly enlarged . Healedl left rib fractures are noted .
    OUTPUT:
    
1 . No acute cadiopulmonary process . 2 . Mild cardiomegaly .