Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat lower than before . There is increased streaky density at the lung bases likely representing subsegmental atelectasis . A very small right apical pneumothorax is probably stable in size . A right chest tube remains in place . The patient is status post median sternotomy and MVR is demonstrated earlier . The patient has been extubated and a nasogastric tube has been withdrawn . Mediastinal drains and the right jugular sheath remain in place .
    OUTPUT:
    
Persistent small right pneumothorax . Increased streaky density at the lung bases likely representing subsegmental atelectasis .