Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . There are bibasilar opacities , which could be due to infection or aspiration . The mediastinum is not widened . The cardiac silhouette is top normal to mildly enlarged . Dual - lead left - sided pacemaker is again seen with leads extending to the expected positions of the right atrium and right ventricle .
    OUTPUT:
    
Bibasilar opacities could be due to infection or aspiration . Borderline to mildly enlarged cardiac silhouette .