Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a streaky left basilar opacity which is most likely due to atelectasis . Known pulmonary nodules are not clearly delineated on this chest x-ray . The lungs otherwise are clear , there is no confluent consolidation or effusion . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary process . Known pulmonary nodules not clearly delineated on this chest x-ray .