Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with secondary bronchovascular crowding and bibasilar opacities which are likely secondary to atelectasis . The lung fields are otherwise grossly clear without focal consolidation . There is no pneumothorax or pleural effusion . The cardiac silhouette is enlarged but likely accentuated by low lung volumes . Right shoulder arthroplasty changes are noted . A lap band is seen in the left upper abdomen .
    OUTPUT:
    
Low lung volumes without definite acute cardiopulmonary process .