Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are left mid to lower lung and right middle lobe opacities . There is no effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . Old posterior left seventh rib fractures noted . No acute osseous abnormalities are seen , hypertrophic changes noted in the spine .
    OUTPUT:
    
Bilateral parenchymal opacities , most notable in the right middle lobe worrisome for pneumonia .