Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP supine and lateral views of the chest provided . Lung volumes are low . Allowing for this , no definite evidence of pneumonia or overt CHF . No supine evidence for effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact .
    OUTPUT:
    
Limited , negative .