Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart remains mildly enlarged . The aorta is mildly unfolded . The hilar contours are normal . Streaky opacities are noted within the lung bases . There is mild elevation of the right hemidiaphragm , with a possible small right pleural effusion . The pulmonary vascularity otherwise is not engorged . There is no pneumothorax . Mild degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Patchy opacities in the lung bases which could reflect atelectasis , aspiration or infection . Possible trace right pleural effusion .