Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Relatively low lung volumes are noted with linear bibasilar opacities , most likely atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified .
    OUTPUT:
    
Bibasilar opacities likely due to atelectasis in the setting of low lung volumes , noting that infection can not be entirely excluded . If desired , repeat exam with improved inspiratory effort can be performed .