Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , limiting assessment . Within the limitations , there is evidence of right basilar atelectasis . There is no opacity to suggest a pneumonia . Mild vascular congestion is noted without frank pulmonary edema . There is no pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No evidence of pneumonia .