Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear except for nonspecific , relatively symmetrical biapical pleural and parenchymal scarring . The cardiomediastinal silhouette , hila contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .