Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is not enlarged . Cardiomediastinal silhouette is within normal limits . There is no CHF , focal infiltrate or effusion . No pneumothorax is detected . Within the limits of plain film radiography , no hilar mediastinal lymphadenopathy is detected . Thoracic spine within normal limits .
    OUTPUT:
    
No acute pulmonary process identified .