Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right pleural effusion which is unchanged since prior exam . Again seen is a right hilar opacity consistent with fibrosis , better assessed on recent CT . A subtle left lower lobe opacity is seen , which may represent atelectasis , but pneumonia can not be excluded . The lungs are otherwise clear . The cardiomediastinal silhouette is unchanged from prior exam . Visualized osseus structures are unremarkable .
    OUTPUT:
    
1 . Subtle left lower lobe opacity , which may represent atelectasis , but pneumonia can not be excluded . PA and lateral radiographs could allow for better assessment of this opacity . 2 . Stable right pulmonary effusion .