Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate a chronic right middle lobe opacity which corresponds to linear scarring , which is unchanged from ___ . No superimposed infectious process is identified . The remainder of the lungs is clear . The cardiac and mediastinal contours are normal . No pleural abnormality is detected .
    OUTPUT:
    
Stable minimal linear right middle lobe scarring which is unchanged from ___ . No acute cardiopulmonary process .