Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Subtle areas of increased density at the lung bases is again demonstrated with 10 mm nodular opacity in the right lung base in approximate location of previously seen 8 mm nodule on prior CT . No dense consolidation . Pleural surfaces are clear without effusion or pneumothorax . Biapical scarring is moderate .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Subtle scattered nodular opacities measuring up to 10 mm in the right lung base , corresponding to nodule seen on prior CT .