Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is accentuated as result , appearing mildly enlarged . Mediastinal and hilar contours are grossly unremarkable . Crowding of bronchovascular structures is present without overt pulmonary edema . Minimal patchy opacities within the lung bases likely reflect areas of atelectasis . No focal consolidation , large pleural effusion or pneumothorax is detected on this supine exam . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .