Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta is tortuous . Mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Streaky opacities in the lung bases likely reflect atelectasis . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Streaky bibasilar opacities , most reflective of atelectasis .