Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . Retrocardiac density with an air - fluid level is consistent with known large hiatal hernia . Lungs are clear without pleural effusion , focal consolidation , or pneumothorax . Eventration of the right hemidiaphragm is unchanged .
    OUTPUT:
    
1 . No evidence of focal consolidation concerning for pneumonia . 2 . Large hiatal hernia is unchanged at least since the CT of ___ .