Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As seen previously , there is blunting of the left costophrenic angle which has been unchanged since ___ . There is no focal consolidation to suggest pneumonia . Slight haziness seen at the bases likely represents atelectasis . The cardiac silhouette is top normal and unchanged . There is no pleural effusion or pneumothorax seen . Noted are mild degenerative changes of the thoracic spine .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .