Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is mildly enlarged , likely accentuated due to the presence of low lung volumes . The aorta is tortuous . Crowding of bronchovascular structures is present without overt pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is present . Minimal patchy opacities at the lung bases likely reflect atelectasis . Moderate multilevel degenerative changes are detected in the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .