Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . The aorta is mildly tortuous . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Scarring is noted right upper lobe with a 12 mm circular opacity noted , potentially an area of cavitation . Linear opacities within the right middle lobe are compatible with areas of subsegmental atelectasis or scarring . No focal consolidation , pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
12 mm circular opacity within the right upper lobe could potentially reflect a cavitary lesion given the patient 's history of tuberculosis . No focal consolidation otherwise demonstrated .