Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Lower lung volumes are seen with streaky bibasilar opacities suggestive of atelectasis . Cardiomediastinal silhouette is unchanged as is apparent enlargement of the right hilum . No acute osseous abnormality is identified .
    OUTPUT:
    
No acute cardiopulmonary process . Stable enlargement of the right hilum dating back to ___ , may be in part positional .