Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Worsening left retrocardiac and basal opacity could be atelectasis / consolidation . Large hiatal hernia with air - fluid level is seen . The cardial mediastinal silhouette is compared well . No displaced rib fractures .
    OUTPUT:
    
Large hiatal hernia with slight worsening left retrocardiac opacity can be atelectasis / aspiration .