Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size remains markedly enlarged . Atherosclerotic calcifications are noted diffusely within the aorta . Crowding of bronchovascular structures is present as result of low lung volumes . Streaky opacities in the lung bases likely reflect areas of atelectasis . No large pleural effusion or pneumothorax is present . There are mild multilevel degenerative changes seen in the thoracic spine .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .