Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Faint opacity in the right lower lung may project over spine on lateral view . Mediastinal contour hila , and cardiac silhouette are normal . No pleural effusion or pneumothorax .
    OUTPUT:
    
Right lower lung opacity may represent atelectasis or possible atypical pneumonia . Further evaluation with shallow oblique views would be helpful to clarify .