Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded with flattening of both diaphragms compatible with COPD / emphysema . Bronchiectasis is visible in the right lung base . A right middle lobe opacity is unchanged from prior chest radiographs and CT . Biapical pleural parenchymal scarring is noted . There is no significant pleural effusion or pneumothorax . The cardiomediastinal and hilar contours are within normal limits and unchanged . Right - sided aortic arch is again noted . Diffuse calcification of the tracheal tree is noted . The bones are diffusely demineralized . No displaced rib fractures are detected .
    OUTPUT:
    
COPD / emphysema without acute abnormality . No displaced rib fractures detected . Known right lower lung nodule better seen on prior CT scan .