Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Aortic knob is calcified . Mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Mild dependent atelectatic changes are seen in the lung bases . Trace pleural effusions are likely present bilaterally . No pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis . Probable trace bilateral pleural effusions .