Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . Mild to moderate compressive atelectasis is noted , particular in the retrocardiac area . The heart size is normal . Large hiatal hernia is re-demonstrated . Mild degenerative changes are seen in the thoracic spine . No pulmonary edema or pneumothorax . No focal consolidations are identified .
    OUTPUT:
    
Large hiatal hernia with adjacent retrocardiac atelectasis , unchanged . No acute cardiopulmonary process otherwise noted .