Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged with heart size appearing mildly enlarged . Low lung volumes persists with crowding of bronchovascular structures but no overt pulmonary edema . Atelectasis in the lung bases persists . No focal consolidation , pleural effusion or pneumothorax is present . Cholecystectomy clips are demonstrated in the right upper quadrant of the abdomen . Contrast from recent CT exam is seen within the collecting systems bilaterally .
    OUTPUT:
    
Persistently low lung volumes with bibasilar atelectasis .