Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Mild bibasilar opacities are seen , left greater than right , which could represent pneumonia . Rounded opacity in the lateral left lung base is again seen , consistent with lipoma seen on prior CT . There is no large pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Mild bibasilar opacities , left greater than right , which could represent atelectasis but can not exclude aspiration or pneumonia in the right clinical setting .