Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large left lower lobe opacity with multiple air - fluid levels consistent with patient 's known large hiatal hernia with adjacent atelectasis . Otherwise , the remainder of the lungs are clear . Cardiomediastinal silhouette appears within normal limits . Calcifications are noted at the aortic arch .
    OUTPUT:
    
Large hiatal hernia with no sign of consolidation / aspiration .