Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The hilar and mediastinal contours are within normal limits . The central pulmonary vessels are prominent ; however , no overt edema is seen . The lung volumes are low , resulting in bronchovascular crowding . Bibasilar linear opacities are most compatible with atelectasis , although increased right basilar opacity may reflect a small consolidation . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Low lung volumes . Bibasilar atelectasis . Right basilar opacity is likely atelectasis ; however , please correlate with physical findings in this area to exclude consolidation .