Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette persists . The mediastinal and hilar contours are similar . Pulmonary vasculature is normal . Lungs remain hyperinflated with emphysematous changes re - demonstrated . Patchy ill - defined opacities are seen in both lung bases , more so on the left , are concerning for infection . No pleural effusion or pneumothorax is present . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
Patchy bibasilar airspace opacities , more pronounced on the left , concerning for multifocal pneumonia .