Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Linear bibasilar opacities are most suggestive of atelectasis in the setting of low lung volumes . Superiorly , the lungs are clear . Blunting of the posterior costophrenic angles may be due atelectasis or small effusions . Cardiomediastinal silhouette is within normal limits . Degenerative changes noted in the spine . Surgical clips identified in the upper abdomen .
    OUTPUT:
    
Low lung volumes with bibasilar opacities , likely atelectasis .