Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is small opacity in the left lung base consistent with atelectasis . The lungs are otherwise clear . There is a small left pleural effusion . There is no right pleural effusion . No pneumothorax is seen . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Small amount of atelectasis in left lung base with small left pleural effusion .