Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is a vague opacity in the right lower lobe , which has been present intermittently on prior studies . Although this may represent postinflammatory changes , pneumonia can not be entirely excluded . Clinical correlation and follow up imaging would be advised especially if the patient 's symptoms persist . There is no pulmonary edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Vague opacity in the right lower lobe , which may represent post inflammatory changes or may be acute . Clinical correlation is recommended . Follow up imaging should be performed if the patient 's symptoms persist or worsen .