Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size remains borderline enlarged , and the aorta remains tortuous . Pulmonary vasculature is normal . Streaky opacities in the lung bases likely reflect atelectasis , with no focal consolidation present . The lungs are hyperinflated . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is seen .
    OUTPUT:
    
Streaky bibasilar opacities likely reflect atelectasis . Infection , however , is difficult to exclude .