Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal chest . The lungs are well expanded . There are subtle bibasilar opacities which raise concern for bilateral lower lobe pneumonia . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Subtle bibasilar opacities which raise concern for bilateral lower lobe pneumonia .