Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky bibasilar opacities are likely due to atelectasis in the setting of lower lung volumes . The lungs are otherwise clear without focal consolidation , large effusion or edema . Cardiomediastinal silhouette is stable and accentuated on today 's exam due to technique and lower lung volumes . Catheter , presumably from VP shunt , projects over the right side of the chest .
    OUTPUT:
    
Lower lung volumes without definite acute cardiopulmonary process .