Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are low with bibasilar atelectasis noted . Difficult to exclude a component of aspiration or pneumonia at the lung bases . No large effusion or pneumothorax . Cardiomediastinal silhouette is stable . Bony structures are intact . No displaced rib fracture is seen .
    OUTPUT:
    
Bibasilar opacities , likely atelectasis difficult to exclude aspiration or component of pneumonia .