Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right lower lobe opacity measuring 5 .4 x 4 .6 cm which contains an air - fluid level . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Right lower lobe cavitary lesion is most suspicious for cavitary pneumonia . Follow - up radiograph after treatment is recommended to ensure resolution .