Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval increase in left lower lobe opacity which trace right pleural effusion . The lungs are moderately well inflated with bibasilar atelectasis . No left pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . The aorta is tortuous . Visualized osseous structures are notable for an old right clavicular fracture .
    OUTPUT:
    
1 . Increase left lower lobe opacity with trace right pleural effusion is worrisome for pneumonia or aspiration pneumonia .