Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated , and no focal consolidation , pleural fusion or pneumothorax is seen . The central bronchovascular structures are accentuated by the low lung volumes . The heart size is normal . A hiatal hernia is again seen . The patient is status post left mastectomy , and surgical clips project over the left chest . Degenerative changes of the mid-thoracic spine are noted . Previously noted pulmonary nodules are not well appreciated on this radiograph and better seen on the chest CT .
    OUTPUT:
    
1 . Low lung volumes . 2 . Hiatal hernia .