Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show a new right and left lower lobe opacity . The cardiac silhouette is enlarged , unchanged . The mediastinal silhouette and hilar contours are unremarkable . No pleural effusion or pneumothorax is present . Multiple right ventricular and right atrium leads are noted , unchanged . A left - sided pacer is also unchanged in position .
    OUTPUT:
    
New bibasilar opacities could represent atelectasis , sequelae of aspiration or pneumonia .