Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes cause bronchovascular crowding and bibasilar platelike atelectasis . Linear opacity projecting above the left hemidiaphragm is unchanged from prior studies and likely represents chronic scarring . There is no pleural effusion , pulmonary edema , focal consolidation , or pneumothorax . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Low lung volunes , no evidence of acute cardiopulmonary process .