Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal left basilar atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . Unchanged defect in the left posterior sixth rib . A surgical clips project along the left mediastinal border . The size and appearance of the cardiac silhouette is unchanged .
    OUTPUT:
    
Minimal left basilar atelectasis .