Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal linear opacity within the left base is unchanged and likely related to scarring . No new confluent consolidation is identified to suggest aspiration or pneumonia . There is no overt pulmonary edema or large effusions . Cardiomediastinal and hilar contours are within normal limits . An ovoid opacity overlying the left apex is likely something outside of the patient .
    OUTPUT:
    
No evidence of pneumonia or pulmonary edema