Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A faint linear opacity at the left base is likely scarring or atelectasis . The lungs are otherwise clear . There is no pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal . There is no evidence of hilar lymphadenopathy .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically , no evidence of hilar lymphadenopathy .