Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild lingular scarring , as seen on prior chest CT . There is no focal opacity to suggest pneumonia . There is no pleural effusion or pneumothorax . The hilar and cardiomediastinal contours are unchanged . Tortuosity of the thoracic aorta is again noted . No acute osseous abnormalities and no free air is seen in the hemidiaphragms .
    OUTPUT:
    
No evidence of pneumonia or other acute cardiopulmonary process .