Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new bronchial wall thickening as compared to the prior radiograph , but no focal consolidations that are concerning for bacterial pneumonia . Cardiac silhouette is normal size . No pleural effusion or pneumothorax . Severe atherosclerotic calcifications in the aortic knob are unchanged .
    OUTPUT:
    
Bronchial wall thickening may be due to bronchitis or aspiration .