Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . There are new patchy opacities in the left upper lobe , concerning for an infectious process . Bilateral lower lung patchy opacities are not significantly changed compared to the prior study from ___ , likely atelectasis . There are no pleural effusions . No pneumothorax is seen . The heart is normal in size . Note is made of mild unfolding of the descending thoracic aorta , unchanged . The mediastinal contours are otherwise normal . Cholecystectomy clips are noted in the right upper abdominal quadrant .
    OUTPUT:
    
Left upper lobe pneumonia as well as unchanged bibasilar atelectasis / scarring .