Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Inspiratory volumes are at the lower limits of normal or minimally diminished . Cardiomediastinal silhouette is unchanged , with sternotomy wires and multiple mediastinal clips noted . Again seen is curvilinear density adjacent to the right heart border question related to prior surgery . No CHF . Minimal atelectasis at both lung bases is probably slightly improved . The possibility of minimal blunting of the costophrenic angles can not be excluded , but no gross pleural effusion is identified . Biapical pleural thickening is again noted , similar to the prior film . No pneumothorax is detected .
    OUTPUT:
    
1 . Status post sternotomy . Cardiomediastinal silhouette is unchanged . 2 . No CHF , frank consolidation or gross effusion . 3 . Minimal bibasilar atelectasis appears slightly improved .