Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear perihilar right opacity is again seen , potentially due to scarring . Lungs are otherwise clear . Cardiomediastinal silhouette is within normal limits . There is tortuosity of the thoracic aorta . No acute osseous abnormalities .
    OUTPUT:
    
Right midlung linear opacity which is likely scarring . No superimposed acute cardiopulmonary process .