Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An opacity in the left costophrenic angle on the frontal view but not well seen on the lateral view may represent an early pneumonia or atelectasis . Otherwise there is no focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
Left lower lobe opacity only seen on one view may represent early pneumonia or atelectasis .