Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The aorta is mildly tortuous with calcifications is noted at the aortic knob . Calcified granulomas are re - demonstrated in the left upper lobe medially . The pulmonary vascularity is normal and the hilar contours are unremarkable . Lungs are hyperinflated compatible with emphysema as seen previously . Ill - defined nodular and branching opacities are noted within the left lung base , which could reflect bronchial inflammation or infection or infection as seen on the prior chest CT . The . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Findings suggestive of an inflammatory or infectious process involving the airways within the left lung base .