Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is an equivocal opacity seen posteriorly in the lower lungs , probably in the right lower lobe and not necessarily changed ; pneumonia or atelectasis could be considered . The cardiomediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
Vague right lower lobe opacity , not specific but potentially pneumonia in the appropriate setting .