Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are within normal limits . There is a heavily calcified aortic arch . The bilateral hila are unremarkable . There is evidence of bronchial wall thickening most conspicuous in the lower lobes , suggestive of small airways disease . There is a left a lower lobe opacity which is concerning for infection or sequelae of aspiration the appropriate clinical setting . There is no right pleural effusion . Difficult to exclude a trace left pleural effusion . There is no pneumothorax .
    OUTPUT:
    
1 . Left lower lobe opacity concerning for infection or sequelae of aspiration in the appropriate clinical setting . 2 . Possible trace left pleural effusion . 3 . Bronchial wall thickening in the lower lobes is suggestive small airways disease .