Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The heart size is normal . The mediastinal contours are unremarkable . There is crowding of the bronchovascular structures but no pulmonary edema is demonstrated . The hilar contours are unremarkable . Patchy opacities in the lung bases may reflect atelectasis , aspiration or pneumonia . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Low lung volumes limit assessment of the lung bases . Patchy opacities at lung bases may reflect pneumonia , aspiration or atelectasis . Consider repeat PA and lateral views when the patient is able to take a deeper inspiration .