Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest demonstrate a right medial basilar opacity and a left basilar retrocardiac opacity which have increased since previous imaging . These findings would be consistent with the clinical diagnosis of pneumonia . There is a small right pleural effusion but no left pleural effusion . No pneumothorax is seen . Cardiac size is top normal . Mediastinal silhouette is unremarkable .
    OUTPUT:
    
Bibasilar opacities consistent with clinical diagnosis of pneumonia .