Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal . The mediastinal and hilar contours are stable . There may be minimal left base atelectasis .
    OUTPUT:
    
Possible mild left base atelectasis without definite focal consolidation seen .